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Journal articles on the topic 'Aerodynamic stand'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

KRIVOSHEIN, M. A., K. D. SMIRNOV, and K. V. MESHKO. "DETERMINATION AERODYNAMIC CHARACTERISTICS OF ELEMENTS OF BUILDING VENTILATION SYSTEMS IN LABORATORY CONDITIONS." Actual Issues Of Energy 3, no. 1 (2021): 049–53. http://dx.doi.org/10.25206/2686-6935-2021-3-1-49-53.

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The article presents the layout and appearance of the stand, developed to determine the aerodynamic characteristics of the elements of ventilation systems. The technique of determining the aerodynamic characteristics of ventilation elements using the developed stand is considered. The results of tests of a check valve used in natural ventilation systems of buildings are presented. The obtained characteristic of the check valve is proposed to be used in calculating and predicting the operation of ventilation systems in buildings in which the check valves under consideration will be installed

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2

Yates, E. Carson. "Integral Equation Methods for Linear and Nonlinear Aerodynamics." Applied Mechanics Reviews 44, no. 11S (1991): S285—S294. http://dx.doi.org/10.1115/1.3121367.

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This paper reviews the NASA Langley Research Center program for development of integral-equation aerodynamic methods with emphasis on application in computed-aided multidisciplinary design processes as well as in aerodynamic design and stand-alone analysis. The accomplishments, status, and outlook of the program are discussed in order to highlight the scope, generality, versatility, and attractive features of this methodology, especially for application to nonlinear problems.

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An, Xiao Wei, Shu Ping Zheng, and Yu Jie Ji. "Study on Aerodynamic Properties of Impact Plate." Applied Mechanics and Materials 157-158 (February 2012): 970–75. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.970.

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An aero dynamical finite element model on rotary hammering test stand was established in this paper. The external flow field of the model was analyzed by CFD module of ANASYS-FLOTRAN. The distribution of flow velocity and that of flow pressure were obtained, which were analyzed to provide theoretical references for optimum design of impact plate.

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Panayotov, Filip, Ivan Dobrev, Fawaz Massouh, and Michael Todorov. "Experimental study of a helicopter rotor model in hover." MATEC Web of Conferences 234 (2018): 01002. http://dx.doi.org/10.1051/matecconf/201823401002.

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This paper presents the results from an experimental study of the aerodynamic performance and efficiency of a model helicopter rotor in steady hover at Reynolds numbers below 70000. Results are shown for a two-, three- and four-bladed rotor configuration for various pitch angles and speeds of rotation. The influence of the rotor solidity on the aerodynamic efficiency in terms of the Figure of Merit is highlighted. The profile drag component is evaluated as a function of the Reynolds number. The internal friction losses of the test stand are estimated and taken into account in all measurements.

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Batuhtin, Andrej, Marina Baranovskaja, Sergey Batuhtin, and Irina Batukhtina. "Aerodynamic parameters features of air flows in ventilation pipes of underground mining workings." Sustainable Development of Mountain Territories 17, no. 1 (2025): 402–13. https://doi.org/10.21177/1998-4502-2025-17-1-402-413.

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Introduction. The article discusses the features of gas flow in T-shaped pipeline connections, which are widely used in many industries and farms, such as underground mining, energy, water supply, and pneumatic transmission systems. A study of the aerodynamic characteristics of air flows in channels of different diameters connected by a tee has been conducted, and the problems and prospects of improving the efficiency of ventilation equipment in mining enterprises by optimizing air supply processes in the design process, taking into account flow aerodynamics, have been analyzed. The purpose of

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Osintcev, K. V., and S. I. Kuskarbekova. "Development of an automated control system for an educational laboratory stand." Bulletin of the South Ural State University. Ser. Computer Technologies, Automatic Control & Radioelectronics 22, no. 3 (2022): 141–50. http://dx.doi.org/10.14529/ctcr220313.

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The training laboratory stand was created to simulate the operation of a direct-flow boiler, in order to study the hydraulic and thermophysical processes occurring in such devices. Having studied the hydrodynamics of the coolant in a cylindrical composite coil, it is possible to influence the steam capacity of the boiler, improve its energy efficiency. For educational purposes, the student can study the flow modes of liquid and air, learn how to control electrical equipment, master the operation of shut-off valves and parting devices for measuring flow, temperature and pressure. The purpose of

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Bozheeva, D. M., D. A. Dekterev, Ar A. Dekterev, A. A. Dekterev, and D. V. Platonov. "Aerodynamics of airfoil moving along a circular trajectory." Journal of Physics: Conference Series 2119, no. 1 (2021): 012154. http://dx.doi.org/10.1088/1742-6596/2119/1/012154.

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Abstract An experimental and computational study of the NACA0016 airfoil has been carried out for two cases: a stationary airfoil in an incoming flow on an aerodynamic stand and an airfoil moving along a circular trajectory in a stationary flow in a hydrodynamic stand. The Reynolds number for both cases was 60000. A qualitative comparison of the velocity fields for the cases with smooth airflow and boundary layer separation was carried out. It is shown that the used calculation methods describe the task under study with sufficient quality.

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8

Vavilov, I. S., P. S. Yachmenev, V. V. Fedyanin, et al. "Two-gaps microwave ion engine and its study by aerodynamic method." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 6, no. 1 (2022): 109–17. http://dx.doi.org/10.25206/2588-0373-2022-6-1-109-117.

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The article contains the authors’ research in the field of jet propulsion systems with low energy consumption of small spacecraft of the class of nanosatellites. The paper presents a microwave ion engine with double acceleration of ionized gas in the gaps formed by the end surfaces of cylindrical resonators. The results of an experimental study of the pressure force of a jet set of ionized gas by the aerodynamic double angle method are presented. A stand for determining the power parameters of week plasmajet is presented. The design of the prototype is presented. The total energy consumption o

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9

Safonov, Vladimir, Eduard Zhalnin, Marina Lapa, and Dmitry Bordan. "Use of vortex flows for aerodynamic threshing of agricultural crops." E3S Web of Conferences 126 (2019): 00004. http://dx.doi.org/10.1051/e3sconf/201912600004.

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The presence of self-oscillations in the vortex tube allowed threshing of various agricultural crops in it, such as rice, corn, wheat, oats, etc. For aerodynamic threshing of agricultural crops, the following installations were used: for threshing of selection samples, a tube 50 mm in diameter; for threshing corn cobs with a pipe with a diameter of 300 mm, 500 mm and a diameter of 1000 mm; threshing unit (pipes with a diameter of 1.2 ÷ 2 m), an unconventional vortex aerodynamic stand for threshing crops. According to the results of experiments, the threshing parameters are presented.

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10

Berra, Andrea, Miguel Ángel Trujillo Soto, and Guillermo Heredia. "Aerodynamic Interaction Minimization in Coaxial Multirotors via Optimized Control Allocation." Drones 8, no. 9 (2024): 446. http://dx.doi.org/10.3390/drones8090446.

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Coaxial multirotors, characterized by overlapping rotors, represent a common solution to increasing payload capacity while maintaining a compact platform size. However, the overlap between motors generates airflow disturbances that, if not taken into account properly, may decrease the system’s overall performance. In this paper, aerodynamic interactions for coaxial multirotors are analyzed and characterized. Two rotor models are introduced, which account for the aerodynamic interaction between the upper and the lower rotor. Each model is accompanied by its corresponding mixer design and analyz

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Kuskarbekova, Sulpan, Konstantin Osintsev, and Sergei Aliukov. "Novel Hydraulic and Aerodynamic Schemes of Coil Type Steam Generator: A Mathematical Model and Experimental Data." Energies 15, no. 21 (2022): 8203. http://dx.doi.org/10.3390/en15218203.

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Direct-flow steam boilers of the coil type are simple structures in which rather complex processes take place. To study this area, an educational laboratory stand was designed and constructed, which simulates the operation of a boiler of a similar design. In order to optimize the intensification of heat exchange processes in the device, raise its steam capacity, and improve its efficiency, the stand contains hydraulic and aerodynamic circuits for evaluating the movement of the coolant and air flows in the boiler. The proposed mathematical model gave an idea of the nature of the movement of the

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12

Fadlallah, Sulaiman O., Timothy N. Anderson, and Roy J. Nates. "Flow Behaviour and Aerodynamic Loading on a Stand-Alone Heliostat: Wind Incidence Effect." Arabian Journal for Science and Engineering 46, no. 8 (2021): 7303–21. http://dx.doi.org/10.1007/s13369-021-05405-0.

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Nakai, Taro, Akihiro Sumida, Yuji Kodama, Toshihiko Hara, and Takeshi Ohta. "A comparison between various definitions of forest stand height and aerodynamic canopy height." Agricultural and Forest Meteorology 150, no. 9 (2010): 1225–33. http://dx.doi.org/10.1016/j.agrformet.2010.05.005.

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14

Jiang, Yuening, Hai Li, and Hongguang Jia. "Aerodynamics Optimization of a Ducted Coaxial Rotor in Forward Flight Using Orthogonal Test Design." Shock and Vibration 2018 (May 28, 2018): 1–9. http://dx.doi.org/10.1155/2018/2670439.

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To investigate the aerodynamic complexities involved in the combination of freestream and propeller’s suction flow field of ducted coaxial rotors system in forward flight, an orthogonal L16(43) test design has been applied to optimize the design parameters including forward speed, pitch angle, and axial spacing between rotors. Multiblock grids and Multiple Frame of Reference (MFR) method are adopted for calculating aerodynamic performance of the system, hover characteristic was compared with experimental data obtained from the test stand, and the thrust performance is well predicted for variou

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15

MALERONOK, V., V. POTAPOV, and S. ROMANIONOK. "CALCULATICAL GRAPHICAL METHOD FOR CHECKING AND CALIBRATING TENSOMETRIC SENSORS OF AERODYNAMIC SCALES." Herald of Polotsk State University. Series B. Industry. Applied Sciences, no. 2 (August 27, 2024): 57–61. http://dx.doi.org/10.52928/2070-1616-2024-50-2-57-61.

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Calculatical graphical method for checking the readings of tensometric sensors, which are used to measure aerodynamic forces and moments, is proposed. The method is based on the calculation of the static composite structure of the weight mechanism of the laboratory stand NTC-19.02 “Wind Tunnel”. The main forces and moments acting on the structure were determined, the values of which were compared with the readings of strain gauges. In case of discrepancy between the values obtained by measurement and calculation, a calibration graph was constructed and a linear calibration equation was determi

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16

El-Salamony, Mostafa, and Mohamed A. Aziz. "Solar Panel Effect on Low-Speed Airfoil Aerodynamic Performance." Unmanned Systems 09, no. 04 (2021): 333–47. http://dx.doi.org/10.1142/s2301385021500175.

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Recently, a great interest in search of alternate means of power for the traditional fuel for aircraft propulsion is raised so as to decrease gas emissions and reduce operating costs. For the small and micro unmanned aerial vehicles or small transportation aircraft, there are many challenges in the direction of constructing an electric or solar powered airplane whose wings may possibly be sheltered with photo voltaic PV solar panels to harvest sun’s energy for propulsion. Greatest remarkably success solar powered aircraft has attracted the attention of researchers other than UAV and small airc

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17

Rashid, Shagufta, Fahad Nawaz, Adnan Maqsood, Rizwan Riaz, and Shuaib Salamat. "Shock Reduction through Opposing Jets—Aerodynamic Performance and Flight Stability Perspectives." Applied Sciences 10, no. 1 (2019): 180. http://dx.doi.org/10.3390/app10010180.

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In this research paper, investigations of counter flow (opposing) jet on the aerodynamic performance, and flight stability characteristics of an airfoil with blunt leading-edge in supersonic regime are performed. Unsteady Reynolds-Averaged Navier-Stokes ( U R A N S ) based solver is used to model the flow field. The effect of angle of attack ( α ), free-stream Mach number ( M ∞ ), and pressure ratio ( P R ) on aerodynamic performance of airfoil with and without jet are compared. The results indicate that the opposing jet reduces drag from 30 % to 70 % , improves the maximum lift-to-drag ratio

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18

Abood, Yasir A., Waad E. Kasid, Omar Abdulrazzaq, and Haider S. Hussein. "Effect of the Blade Pitch on the Performance of Small Wind Turbine Exposed to Wind Stream of Various Angles of Attack." Iraqi Journal of Industrial Research 9, no. 1 (2022): 31–38. http://dx.doi.org/10.53523/ijoirvol9i1id151.

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In wind turbines, several parameters can affect the productivity of the turbine, such as wind velocity, rotor area, blade aerodynamic design, and blade pitch. In this paper, the effect of various pitch angles for a small wind turbine was investigated. A system of two metal stands with same height is installed (i.e. on the same axis of streaming), the first stand holds an air blower which imitates the wind with constant air blowing. The other, holds a small wind turbine consists of a DC motor and metal hub (steel bush) with 3-blades with equal radial distance (120°). The pitch angle was adjuste

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19

Zuev, V. O., S. V. Dvoynishnikov, I. K. Kabardin, and V. G. Meledin. "Software module for setting up system for 3D geometry measurements in aerodynamic stand using phase triangulation methods." Interexpo GEO-Siberia 8, no. 1 (2022): 105–11. http://dx.doi.org/10.33764/2618-981x-2022-8-1-105-111.

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The paper presents a software module for flexible configuration of a measuring system implements phase triangulation methods to measure three-dimensional profile of objects in aerodynamic experimental stands. To adjust and optimize a wide range of parameters of the measuring system, a universal solution has been implemented, that aimed to control of the operation of phase triangulation algorithms and binary Gray codes. To estimate the measurement error, an automated algorithm is implemented based on a statistical analysis of the distribution of the coordinates of the points of the measured sur

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20

Liu, Meizhi, Takashi Maruyama, Kansuke Sasaki, Minoru Inoue, Masato Iguchi, and Eisuke Fujita. "Measurement of Aerodynamic Characteristics Using Cinder Models through Free Fall Experiment." Atmosphere 12, no. 5 (2021): 608. http://dx.doi.org/10.3390/atmos12050608.

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Rocks ejected from a volcanic eruption often cause loss of lives and structures. Aerodynamic characteristics are needed for evaluating motions of volcanic rocks for the reduction of damage. Falling motions of volcanic rock were measured by using models imitated the configuration of cinders collected at the site of the experiment, Sakurajima volcano. Two types, one with sharp edges and one without sharp edges, were selected as representative of cinder and a sphere was selected as reference model. The falling motions of the models dropped down from a drone were recorded by video camera and a sta

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Lapushkina, T. A., E. V. Kolesnik, N. A. Monahov, P. A. Popov, and K. I. Belov. "Features of Supersonic Flow Around a Blunt Body in the Area of Junction with a Flat Surface." Fluids 10, no. 2 (2025): 28. https://doi.org/10.3390/fluids10020028.

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This work studies the influence of a growing boundary layer on the process of supersonic flow around an aerodynamic body. The task is to select and implement in an experiment the parameters of a supersonic flow and to study the flow pattern near the surface of an aerodynamic body at different viscosity values for the incoming flow. Visualization of the shock wave configuration in front of the body and studying the change in the pressure field in the flow region under these conditions is the main goal of this work. The experiment was carried out on an experimental stand created on the basis of

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22

Sun, Jianwei, Koichi Yonezawa, Eiji Shima, and Hao Liu. "Integrated Evaluation of the Aeroacoustics and Psychoacoustics of a Single Propeller." International Journal of Environmental Research and Public Health 20, no. 3 (2023): 1955. http://dx.doi.org/10.3390/ijerph20031955.

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Aeroacoustic noise in multiple rotor drones has been increasingly recognized as a crucial issue, while noise reduction is normally associated with a trade-off between aerodynamic performance and sound suppression as well as sound quality improvement. Here, we propose an integrated methodology to evaluate both aeroacoustics and psychoacoustics of a single propeller. For a loop-type propeller, an experimental investigation was conducted in association with its aerodynamic and acoustic characteristics via a hover stand test in an anechoic chamber; the psychoacoustic performance was then examined

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Ezendeeva, Diana, Sergei Kakaulin, Maxim Gordienko, and Ivan Kabardin. "Investigation of flow kinematics in the structured multibed catalytic cartridge." EPJ Web of Conferences 196 (2019): 00058. http://dx.doi.org/10.1051/epjconf/201919600058.

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The reduction of harmful substances emission into the atmosphere is very important to create compact, energy-efficient catalytic units for afterburning volatile organic compounds. A key component of such units is the catalyst cartridge. The efficiency of its operation is provided by the supply of a gas flow with a uniform velocity field. To solve the problem, the gas flow distributor and an aerodynamic stand for its testing were created. A set of air-flow blades was used to align the velocity profile before the catalyst cartridge. Also flow kinematics inside the cartridge was investigated via

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Lisowski, Filip, and Edward Lisowski. "Determination of Aerodynamic Drag Coefficients of Longitudinal Finned Tubes of LNG Ambient Air Vaporizers using CFD and Experimental Methods." Applied Sciences 12, no. 21 (2022): 10865. http://dx.doi.org/10.3390/app122110865.

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This paper presents the results of numerical and experimental studies of wind action on longitudinal finned tubes of LNG ambient air vaporizers. The main objective of the study was to determine the aerodynamic drag coefficients for longitudinal finned tubes with different number of fins considering various directions of wind action. Numerical calculations were performed using CFD analysis, while experimental tests were carried out in a wind tunnel test stand. The obtained results indicate the variation of tube loads depending on the number of fins and the direction of wind action and can be us

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Dziubak, Tadeusz, and Yurii Yendzheiovskyi. "Properties analysis of filtration materials with nanofibers addition." Bulletin of the Military University of Technology 68, no. 1 (2019): 111–29. http://dx.doi.org/10.5604/01.3001.0013.1475.

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Nanofiber properties, methods of their production, and areas of their application have been presented. Parameters describing filtration materials with nanofibers addition were presented, and analyzed. Methodology for testing aerodynamic characteristics as well as characteristics of: efficiency, accuracy, and filter cartridges resistance with nanofibers addition, depending on the dust mass loading km were developed. Characteristic filtration parameters of the materials with nanofibers addition are presented. Five filtration inserts, differing in the filtration material with nanofibers addition,

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Lane, P., G. Throneberry, I. Fernandez, M. Hassanalian, R. Vasconcellos, and A. Abdelkefi. "Towards Bio-Inspiration, Development, and Manufacturing of a Flapping-Wing Micro Air Vehicle." Drones 4, no. 3 (2020): 39. http://dx.doi.org/10.3390/drones4030039.

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Throughout the last decade, there has been an increased demand for intricate flapping-wing drones with different capabilities than larger drones. The design of flapping-wing drones is focused on endurance and stability, as these are two of the main challenges of these systems. Researchers have recently been turning towards bioinspiration as a way to enhance aerodynamic performance. In this work, the propulsion system of a flapping-wing micro air vehicle is investigated to identify the limitations and drawbacks of specific designs. Each system has a tandem wing configuration inspired by a drago

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Yachmenev, P. S., V. V. Fedyanin, and I. S. Vavilov. "DEVELOPMENT OF A THRUST MEASUREMENT STAND BASED ON THE AERODYNAMIC METHOD FOR ELECTRIC THRUSTERS OF SMALL SPACECRAFT." DYNAMICS OF SYSTEMS, MECHANISMS AND MACHINES 11, no. 2 (2023): 51–57. http://dx.doi.org/10.25206/2310-9793-2023-11-2-51-57.

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A traction measurement stand based on the aerodynamic method has been developed. To test the stand, a prototype electric rocket engine was used as a cold gas engine. The working medium was nitrogen gas. At a flow rate of 1.2 mg/s, the thrust value was from 0.674 to 0.736 mN, at a flow rate of 1.7 mg/s, the thrust value was 0.934-1 mN and at a flow rate of 2.6 mg/s, the thrust value was from 1.59 to 1.634 mN. The experimental specific thrust impulse was at a flow rate of 1.2 mg/s from 574 to 613 m/s, at a flow rate of 1.7 mg/s from 549 to 588 m/s and at a flow rate of 2.6 mg/s from 612 to 623 m

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Goswami, Gunjan, Simran Bamola, Amla Chopra, and Anita Lakhani. "Unlocking PM1-Bound Cytotoxicity: Where Do We Stand and What's Next?" Contemporary Advances in Science and Technology 07, no. 01 (2024): 29–44. http://dx.doi.org/10.70130/cast.2024.7103.

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Particulate matter (PM) in air stands as a crucial environmental health concern, implicated in various diseases based on extensive epidemiological investigations. Associations between PM exposure and conditions such as acute respiratory infections, lung cancer, and chronic respiratory and cardiovascular diseases have been well-established. Despite incomplete To better understand how these biological processes work, in vitro studies have shown that PM1 causes harmful effects on cells, damage to DNA, and increased production of proinflammatory cytokines. Biomass burning and vehicular emissions c

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Kuskarbekova, S. I., A. D. Khrutskaya, E. N. Fedorenko, I. F. Karimov, and D. U. Zulkarnaev. "Analyzing the method of increasing the energy efficiency for a direct-flow generator unit based on an educational laboratory stand." IOP Conference Series: Earth and Environmental Science 1154, no. 1 (2023): 012016. http://dx.doi.org/10.1088/1755-1315/1154/1/012016.

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Abstract The article investigates the modes of gas flow through the flue of a steam direct-flow generator unit using a laboratory stand formed from a cylindrical coil. The criterion for determining the gas flow regime is a dimensionless quantity called the Reynolds number. The speeds and temperatures of the airflow were determined experimentally. Based on these results, the Reynolds number was calculated and the flow modes at each measurement point were determined, as well as the dependence of the Reynolds number on temperature and velocity was obtained, the experiment was analyzed. The reason

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Kuskarbekova, Sulpan, Elena Fedorenko, Anastasia Khrutskaya, and Ildar Karimov. "Numerical and physical modeling of the aerodynamic process in a direct-flow coil-type boiler using a laboratory stand." E3S Web of Conferences 480 (2024): 01003. http://dx.doi.org/10.1051/e3sconf/202448001003.

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The article examines the modes of gas passage through the chimney of a direct-acting steam generator set using a laboratory stand made of a cylindrical coil. The criterion for determining the gas flow regime is a dimensionless quantity called the Reynolds number. The air flow velocities and temperatures were determined experimentally. Based on these results, the Reynolds number was calculated and the flow regimes at each measurement point were determined, and the dependence of the Reynolds number on temperature and velocity was obtained, and the experiment was analyzed. With the help of the AN

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Qiao, Lei, Junqiang Bai, Yasong Qiu, Jun Hua, and Jiakuan Xu. "A Blended Continuation Method for Solving Steady Inviscid Flow." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 36, no. 1 (2018): 57–65. http://dx.doi.org/10.1051/jnwpu/20183610057.

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Steady flow field solving is wieldly used in aircraft aerodynamic design, efficiency of steady flow field solving has great influnence on efficiency of aircraft aerodynamic design. A continuation method that blended Laplacian operator and pseudo time marching method for solving steady inviscid flow problem is proposed. In steady flow problem, the field is usually initialized as an uniform field before starting iteration. This resulted in the fact that the initial residual in only nonzero on wall boundary. Based on this feature, Laplacian operator is introduced to accelarate convergence at the

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Sun, Jianwei, Koichi Yonezawa, Eiji Shima, and Hao Liu. "Experimental investigations on aerodynamic and psychoacoustic characteristics of three-blade looprop propeller." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A144. http://dx.doi.org/10.1121/10.0023064.

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Aeroacoustic noise in multiple rotor drones has been increasingly recognized as a crucial issue. This study focuses on addressing this challenge by introducing a novel low-noise looprop propeller design with three blades. Unlike traditional propellers, the looprop propeller utilizes three closed-loops to generate thrust. Through comprehensive experimental investigations conducted in an anechoic chamber using a hover stand test, we conducted an integrated study of the propeller's aerodynamic, aeroacoustic, and psychoacoustic characteristics. The results demonstrate that the three-blade looprop

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Torabi Asr, Mahdi, Reza Osloob, and Faizal Mustapha. "Double-Stage H-Darrieus Wind Turbine - Rotor Aerodynamics." Applied Mechanics and Materials 829 (March 2016): 21–26. http://dx.doi.org/10.4028/www.scientific.net/amm.829.21.

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H-Darrieus wind turbines, due to their simple design and relatively low manufacturing costs have recently received much attention particularly for standalone applications. However start-up issues associated with their operation restricted their operation in areas of low average wind speed and encourages engineers to develop novel design. Several design proposed in this way but in most cases design came up with complex sensing mechanisms and mechanical actuators or high cost manufacturing parts. A recent rotor design called double Darrieus rotor proposed as a German patent case bridged these co

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Vavilov, I. S., P. S. Yachmenev, V. V. Fedyanin, P. V. Stepen’, A. I. Lukyanchik, and K. I. Zharikov. "Determination of the thrust of an ion thruster by the resonant aerodynamic method (RAM-method)." Journal of Physics: Conference Series 2182, no. 1 (2022): 012068. http://dx.doi.org/10.1088/1742-6596/2182/1/012068.

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Abstract This paper presents the results of an experimental study of the jet thrust of ionized nitrogen flowing from the working chamber of an experimental sample of an accelerator ion thruster into a vacuum space. The resonant aerodynamic method (RAM-method) was chosen as the main research method. A method for determining low thrust and the design of a stand for implementing the RAM- method are proposed. The object of research is a prototype of an accelerator two-gap ion thruster with a solid-state microwave plasma generator and a toroidal resonator. The study showed that a 2.5 W microwave ge

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Abramova, Anna V., Daniil A. Kozlov, Varvara O. Veselova, et al. "Coating of Filter Materials with CeO2 Nanoparticles Using a Combination of Aerodynamic Spraying and Suction." Nanomaterials 13, no. 24 (2023): 3168. http://dx.doi.org/10.3390/nano13243168.

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Textiles and nonwovens (including those used in ventilation systems as filters) are currently one of the main sources of patient cross-infection. Healthcare-associated infections (HAIs) affect 5–10% of patients and stand as the tenth leading cause of death. Therefore, the development of new methods for creating functional nanostructured coatings with antibacterial and antiviral properties on the surfaces of textiles and nonwoven materials is crucial for modern medicine. Antimicrobial filter technology must be high-speed, low-energy and safe if its commercialization and mass adoption are to be

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Laguna-Canales, Aldo Saul, Guillermo Urriolagoitia-Sosa, Beatriz Romero-Ángeles, et al. "Numerical Evaluation of the Effectiveness of the Use of Endplates in Front Wings in Formula One Cars under Multiple Track Operating Conditions." Fluids 9, no. 10 (2024): 232. http://dx.doi.org/10.3390/fluids9100232.

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The last change in the technical regulations of Formula One that came into force in 2022 brought with it significant changes in the aerodynamics of the vehicle; among these, those made to the front wing stand out since the wing was changed to a more straightforward shape with fewer parts but with no less efficiency. The reduction in its components suggests that if one part were to suffer damage or break down, the efficiency of the entire front wing would be affected; however, from 2022 to date, there have been occasions in which the cars have continued running on the track despite losing some

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Zhuang, Haixiong, Xiaojun Yang, and Zhenling Wu. "A Parameterization Scheme for Air–Sea Surface Interface Fluxes: Design and Stand-Alone Experiments." Journal of the Atmospheric Sciences 75, no. 7 (2018): 2359–83. http://dx.doi.org/10.1175/jas-d-17-0384.1.

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Abstract Observations show that sea surface temperature (SST) can vary up to several degrees in a day and sea surface energy fluxes up to a few hundreds of watts per square meter. For synoptic- and subsynoptic-scale atmospheric modeling, there remains a need for the parameterization of air–sea surface interaction using simple schemes. In this paper, such a simple scheme, Atmosphere–Ocean Surface Interaction Scheme (AOSIS), is presented so that the short time variations in SST and energy fluxes can be estimated using a small number of atmospheric and oceanic bulk quantities. The scheme consists

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Hennings, H., and W. Send. "Experimental Investigation and Theoretical Predication of Flutter Behavior of a Plane Cascade in Low Speed Flow." Journal of Engineering for Gas Turbines and Power 120, no. 4 (1998): 766–74. http://dx.doi.org/10.1115/1.2818465.

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The Institute of Aeroelasticity operates a test facility which enables aeroelastic investigations of plane cascades in low-speed flow. The test stand serves as a pilot facility to develop tools for analogous investigations in transonic flow. Eleven blades are elastically suspended in a windtunnel with a 1 × 0.2 m2 cross section. This paper describes the experimental method of determining the flutter boundary by extrapolation of the results measured in subcritical flow. A two-dimensional theoretical model of the 11 blades, including the windtunnel walls, permits the computation of unsteady pres

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Vavilov, I. S., P. S. Yachmenev, K. I. Zharikov, V. V. Fedyanin, A. I. Lukyanchik та P. V. Stepen’. "Determination of the thrust of an ion thruster by the aerodynamic method of double angle (AMαβ-method)". Journal of Physics: Conference Series 2182, № 1 (2022): 012100. http://dx.doi.org/10.1088/1742-6596/2182/1/012100.

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Abstract This paper presents the results of an experimental study of the jet thrust of a mixed jet of neutral and ionized nitrogen flowing from the working chamber of an experimental sample of an accelerator ion thruster into a vacuum space. The main method of the study was the aerodynamic double angle method (AMαβ-method). The method of determining low thrust and the design of the stand for the implementation of the AMαβ-method are proposed. The object of research is a prototype of an accelerator two-phase ion thruster with a solid-state microwave plasma generator and a toroidal resonator. Th

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Wei, Chunhua, Chenglin Zuo, Xianhui Liao, et al. "Simultaneous Pressure and Displacement Measurement on Helicopter Rotor Blades Using a Binocular Stereophotogrammetry PSP System." Aerospace 9, no. 6 (2022): 292. http://dx.doi.org/10.3390/aerospace9060292.

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A simultaneous surface pressure and displacement measurement method that integrates pressure-sensitive paint (PSP) and binocular stereophotogrammetry is proposed. The assays were completed on the Φ4 m rotor test stand at China Aerodynamic Research and Development Center (CARDC). A single-shot lifetime approach was utilized to acquire the instantaneous pressure field on a rotor blade coated with PSP. At the same time, the PSP feature points were used to obtain the 3D coordinates of stereo cameras, which yielded the blade displacement field. The experimental results showed that the displacement

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Bangga, Galih, Steven Parkinson, and William Collier. "Development and Validation of the IAG Dynamic Stall Model in State-Space Representation for Wind Turbine Airfoils." Energies 16, no. 10 (2023): 3994. http://dx.doi.org/10.3390/en16103994.

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Considering the dynamic stall effects in engineering calculations is essential for correcting the aerodynamic loads acting on wind turbines, both during power production and stand-still cases, and impacts significantly the turbine aeroelastic stability. The employed dynamic stall model needs to be accurate and robust for a wide range of airfoils and range of angle of attack. The present studies are intended to demonstrate the performance of a recently implemented “IAG dynamic stall” model in a wind turbine design tool Bladed. The model is transformed from the indicial type of formulation into

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Bekhterev, Dmitriy, Yury Shmatkov, Sulpan Kuskarbekova, Ildar Karimov, and Danil Zulkarnaev. "Intensification of heat-exchange of a direct-flow steam boiler of a coil type based on an educational laboratory stand." E3S Web of Conferences 411 (2023): 01015. http://dx.doi.org/10.1051/e3sconf/202341101015.

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In the work under consideration, using an experimental stand formed by a cylindrical coil, the modes of air movement through the flue of a ramjet steam boiler were investigated. Experimental studies have revealed shortcomings in the operation of a direct-flow steam boiler and proposed ways to increase heat transfer in a steam boiler by turbulizing the gas-air flow in the convective part of the boiler flue. The Ansys programmable engineering environment was used to simulate the heat exchange between waste gases and water in the heat exchanger. The Ansys SpaceClaim program was used to design the

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Mormul, Roman, Alexey Goldobin, and Dmitry Pavlov. "THE CONCEPT OF APPLICATION OF COMPOSITE MATERIALS FOR OPTIMUM DESIGN OF THE AXIAL FAN OF GTI COOLING SYSTEM IN THE COMPOSITION OF GPU “URAL”." Perm National Research Polytechnic University Aerospace Engineering Bulletin, no. 60 (2020): 15–25. http://dx.doi.org/10.15593/2224-9982/2020.60.02.

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The concept of the use of composite materials (СM) for the optimal design of an axial fan (AF) for the cooling system of a gas turbine installation (GTI) as part of the Ural gas pumping unit (GPU) is proposed. GPU of the Ural series developed by PJSC “Research and production association ”Iskra” are intended for the reconstruction of existing and equipping newly built workshops of compressor stations (CS) of gas pipelines, booster compressor stations (BCS), and underground gas storages (UGS). GPU depending on power are equipped with gas turbine units (GTU) based on aircraft or ship engines. The

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Meißner, M., M. Köhler, L. Schwendenmann, and D. Hölscher. "Partitioning of soil water among canopy trees during a soil desiccation period in a temperate mixed forest." Biogeosciences Discussions 9, no. 5 (2012): 5415–43. http://dx.doi.org/10.5194/bgd-9-5415-2012.

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Abstract. Complementary resource use is considered an important mechanism in the study of biodiversity effects. Here we explore how species identity, species mixture and tree size influence the vertical partitioning of soil water among canopy trees during a soil desiccation period. In the Hainich forest, Germany, the species Fagus sylvatica, Tilia sp. and Fraxinus excelsior were studied in single- and three-species mixed clusters, each consisting of three co-dominant trees situated within a larger mixed forest stand. Vertical soil water uptake depth was assessed by analyzing the hydrogen stabl

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Meißner, M., M. Köhler, L. Schwendenmann, and D. Hölscher. "Partitioning of soil water among canopy trees during a soil desiccation period in a temperate mixed forest." Biogeosciences 9, no. 8 (2012): 3465–74. http://dx.doi.org/10.5194/bg-9-3465-2012.

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Abstract. Complementary resource use is considered an important mechanism in the study of biodiversity effects. Here we explore how species identity, species mixture and tree size influence the vertical partitioning of soil water among canopy trees during a soil desiccation period. In the Hainich Forest, Germany, the species Fagus sylvatica, Tilia sp. and Fraxinus excelsior were studied in single- and three-species mixed clusters, each consisting of three co-dominant trees situated within a larger mixed forest stand. Vertical soil water uptake depth was assessed by analyzing the hydrogen stabl

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Panainte-Lehadus, Mirela, Emilian-Florin Mosnegutu, Valentin Nedeff, et al. "Experimental Application of the Process Industry Solid Particle�s Displacement in a Vertical air Flow." Revista de Chimie 71, no. 6 (2020): 9–21. http://dx.doi.org/10.37358/rc.20.6.8165.

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In this article some experimental studies were performed in order to analyze some physical parameters specific for a solid particle during displacement in a vertical air flow. The analyzed parameters were the instantaneous average velocity value and the angular velocity value. To determine the two parameters, a laboratory stand was used for the aerodynamic separation of a mixture of solid particles and a high-speed video camera in order to be able to track the behaviour of the studied particles. At the same time, a working methodology has been designed, implying the use of multiple software, i

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Dmitriev, S., A. Dobrov, D. Doronkov, et al. "FLUID DYNAMICS IN THE CORE OF A WWER REACTOR WITH TVSA OF VARIOUS DESIGNS." PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. SERIES: NUCLEAR AND REACTOR CONSTANTS 2020, no. 4 (2020): 148–57. http://dx.doi.org/10.55176/2414-1038-2020-4-148-157.

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The results of experimental studies of the interassembly interaction of coolant in VVER reactor core which consists of TVSA-T and upgraded TVSA are presented. The modeling of coolant flow in the fuel assembly (FA) was carried out on an aerodynamic stand. The studies were carried out on a fragment model of VVER reactor core and consisted in measuring the velocity vector modulus in the characteristic zones of both TVSA and interassembly space of VVER reactor core. The measurements were carried out by a five-channel pneumometric probe. An analysis of the spatial distribution of projections of the

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KUPRIKOV, Mikhail Yu, Lev N. RABINSKIY, and Nikita M. KUPRIKOV. "Moment-inertial representation of the Square-cube law in aircraft industry." INCAS BULLETIN 11, S (2019): 163–64. http://dx.doi.org/10.13111/2066-8201.2019.11.s.16.

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Flight distance depends on the dimension of the aircraft, but the designers stand against an insurmountable barrier caused by the dimension of the aircraft. In the process of analysis, alternative variants of the moment-inertial layout of fuel, engines, and commercial loads and their influence on the aircraft mass change are considered. A comparative analysis of the characteristics of the moment-inertial layouts of the main aircraft of the normal aerodynamic configuration and the aircraft made according to the flying wing scheme obtained as a result of a numerical experiment showed a clear adv

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Eisenlohr, G., and H. Chladek. "Thermal Tip Clearance Control for Centrifugal Compressor of an APU Engine." Journal of Turbomachinery 116, no. 4 (1994): 629–34. http://dx.doi.org/10.1115/1.2929453.

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To master today’s demand for efficiency and compactness of centrifugal compressor components for small gas turbine engines the main attention must not only be given to the aerodynamic design of the impeller and diffuser components, but also to the installation situation of the surrounding parts. A vital aspect is the tip clearance control between impeller and shroud casing over the total operating range. Using the radial compressor for a small gas turbine engine, developed at BMW Rolls-Royce, the importance of tip clearance control is demonstrated. The possibilities for influencing and optimiz

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Ryder, J., J. Polcher, P. Peylin, et al. "A multi-layer land surface energy budget model for implicit coupling with global atmospheric simulations." Geoscientific Model Development Discussions 7, no. 6 (2014): 8649–701. http://dx.doi.org/10.5194/gmdd-7-8649-2014.

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Abstract. In Earth system modelling, a description of the energy budget of the vegetated surface layer is fundamental as it determines the meteorological conditions in the planetary boundary layer and as such contributes to the atmospheric conditions and its circulation. The energy budget in most Earth system models has long been based on a "big-leaf approach", with averaging schemes that represent in-canopy processes. Such models have difficulties in reproducing consistently the energy balance in field observations. We here outline a newly developed numerical model for energy budget simulatio

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