Relevant bibliographies by topics / Improved blade grid

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Improved blade grid'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Improved blade grid"

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Balalaiev, Anton, Kateryna Balalaieva, Maryna Pikul та Grygoriy Golembiyevskyy. "Власні частоти коливань композитної решітчастої дворядної лопатки вентилятора ТРДД". Aerospace Technic and Technology, № 4 (29 серпня 2024): 49–57. http://dx.doi.org/10.32620/aktt.2024.4.06.

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The subject of this study is the natural oscillations of a grid tandem fan blade of a turbofan engine. The object of this study was a tandem grid fan blade. The purpose of this work was to assess the influence of the material on the natural frequencies of the oscillations of a grid tandem fan blade of a turbofan engine. The following tasks were set and solved in the work: conducting a modal analysis of the natural oscillations of a grid tandem fan blade made of a composite material and titanium alloy; construction of a Campbell diagram for a grid tandem fan blade made of a composite material a
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Chen, Ze, Yuhang Ju, Chuanzhi Sun, Yinchu Wang, Yongmeng Liu, and Jiubin Tan. "3D Shape Measurement of Aeroengine Blade Based on Fringe Projection Profilometer Improved by Multi-Layer Concentric Ring Calibration." Sensors 24, no. 9 (2024): 2810. http://dx.doi.org/10.3390/s24092810.

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The precision requirements for aeroengine blade machining are exceedingly stringent. This study aims to improve the accuracy of existing aeroengine blade measurement methods while achieving comprehensive measurement. Therefore, this study proposes a new concentric ring calibration method and designs a multi-layer concentric ring calibration plate. The effectiveness of this calibration method was verified through actual testing of standard ball gauges. Compared with the checkerboard-grid calibration method, the average deviation of the multilayer concentric ring calibration method for measuring
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BALIKOĞLU, Fatih, Tayfur Kerem Demircioğlu, and Ali IŞIKTAŞ. "Mechanical Properties Of Sandwich Composites Used For Aerofoil Shell Structures Of Wind Turbine Blade." ICONTECH INTERNATIONAL JOURNAL 5, no. 1 (2021): 26–37. http://dx.doi.org/10.46291/icontechvol5iss1pp26-37.

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The grid-scored foams contribute significantly to the overall mechanical properties of the sandwich structures, such as aerofoil shell structure of wind turbine blades which are subjected to different loads under operating conditions. The goal of the present paper is to examine the four-point bending, flatwise and edgewise compression and in-plane shear behaviour of sandwich panels composed of composite face sheets of E-glass/ bisphenol-A epoxy resin and plain and grid-scored PVC foams. The four-point bending failure load of the grid-scored foamed sandwich beams increased by 28.1% compared to
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Zhao, Jie, Li Wang, Dichen Liu, et al. "Dynamic Model of Kaplan Turbine Regulating System Suitable for Power System Analysis." Mathematical Problems in Engineering 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/294523.

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Accurate modeling of Kaplan turbine regulating system is of great significance for grid security and stability analysis. In this paper, Kaplan turbine regulating system model is divided into the governor system model, the blade control system model, and the turbine and water diversion system model. The Kaplan turbine has its particularity, and the on-cam relationship between the wicket gate opening and the runner blade angle under a certain water head on the whole range was obtained by high-order curve fitting method. Progressively the linearized Kaplan turbine model, improved ideal Kaplan tur
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Shahsavari, A., and M. Nili-Ahmadabadi. "Investigation of an innovative non-free vortex aerodynamic procedure to design a single-stage transonic compressor." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 11 (2017): 2132–43. http://dx.doi.org/10.1177/0954410017710272.

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This paper presents an innovative design method for a transonic compressor based on the radial equilibrium theory by means of increasing blade loading. Firstly, the rotor blade of a transonic compressor is redesigned based on the constant spanwise de-Haller number and diffusion. The design method leads to an unconventional increased axial velocity distribution in tip section, which originates from non-uniform enthalpy distribution assumption. A code is applied to extract the compressor meridional plane and blade-to-blade geometry containing rotor and stator in order to design the blade three-d
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Zha, Ruosi, and Kai Wang. "Numerical simulation of flow-induced noise generation and propagation of a floating offshore wind turbine with prescribed pitch motion." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A283. http://dx.doi.org/10.1121/10.0023533.

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It is important to evaluate flow-induced noise emitted due to operations of floating offshore wind turbines since noise pollution can damage the environments of seabirds and aquatic species. This paper studies the aerodynamic and aeroacoustic performance of a laboratory three-blade wind turbine model with an airfoil profile of NREL S826. The wind turbine blade rotation motion is coupled with the prescribed pitch motion of the floating offshore wind power platform. The influence of prescribed pitch motions on the noise generated by wind turbine blades and noise propagation was discussed. Adopti
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Honda, Hironori, Tadashi Kanzaka, Nobuhito Oka, Tom Verstraete, Arnaud Châtel, and Lasse Müller. "Performance improvement of centrifugal compressors for automotive turbochargers using adjoint method." Journal of Physics: Conference Series 2217, no. 1 (2022): 012010. http://dx.doi.org/10.1088/1742-6596/2217/1/012010.

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Abstract A sensitivity calculation using adjoint method has a feature of low calculation cost because sensitivity information of all computational grid points can be calculated by only one numerical simulation. From this feature, it has been utilized as a calculation method of sensitivity information for a gradient-based optimization and this optimization procedure with adjoint method can be one of suitable ways for centrifugal compressor impeller which has a lot of design parameters such as meridional shape, blade angle and thickness. During the gradient-based optimization, mesh morphing, whi
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Yang, Xiaopei, Boyan Jiang, Jun Wang, et al. "Multi-objective optimization of dual-arc blades in a squirrel-cage fan using modified non-dominated sorting genetic algorithm." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 8 (2020): 1053–68. http://dx.doi.org/10.1177/0957650919898983.

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In this study, a dual-arc profile parameterized by four geometric variables was designed to replace the original single-arc profile of a squirrel-cage fan used in a range hood, in order to improve the efficiency of the entire machine and the fan pressure. A modified Non-dominated Sorting Genetic algorithm coupled with a three-dimensional Reynolds-averaged Navier–Stokes computation is applied to search the optimum blade shape. Moreover, a relatively coarse but proven reliable grid model is employed to accelerate the optimization process, and a dynamic crowding distance is applied to improve the
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Pan, Lin, Ze Zhu, Haodong Xiao, and Leichong Wang. "Numerical Analysis and Parameter Optimization of J-Shaped Blade on Offshore Vertical Axis Wind Turbine." Energies 14, no. 19 (2021): 6426. http://dx.doi.org/10.3390/en14196426.

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In this study, the performance of offshore wind turbines at low tip speed ratio (TSR) is studied using computational fluid dynamics (CFD), and the performance of offshore wind turbines at low tip speed ratio (TSR) is improved by revising the blade structure. First, the parameters of vertical axis offshore wind turbine are designed based on the compactness iteration, a CFD simulation model is established, and the turbulence model is selected through simulation analysis to verify the independence of grid and time step. Compared with previous experimental results, it is shown that the two-dimensi
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Matthews, Douglas R., and Nicole L. Key. "Considerations for High-Fidelity Modeling of Unsteady Flows in a Multistage Axial Compressor." International Journal of Turbomachinery, Propulsion and Power 10, no. 1 (2025): 5. https://doi.org/10.3390/ijtpp10010005.

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This paper presents the development and validation of a high-fidelity, unsteady, computational fluid dynamics (CFD) model of the Purdue 3-Stage Axial Research Compressor. A grid convergence study assesses the spatial discretization accuracy of the single-passage, steady-state computational model. Additionally, the periodic-unsteady convergence of the unsteady signals of a multiple-passage transient blade row model was explored. Computational predictions were compared with experimental measurements to evaluate the efficacy of the various modeling decisions. Notably, transient blade row model ca
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Dissertations / Theses on the topic "Improved blade grid"

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Ратушний, Олександр Валерійович, Александр Валерьевич Ратушный та Oleksandr Valeriiovych Ratushnyi. "Повышение напорности ступени центробежного насоса путем усовершенствования лопастной решетки рабочего колеса". Thesis, Изд-во СумГУ, 2015. http://essuir.sumdu.edu.ua/handle/123456789/40844.

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У дисертаційній роботі подане нове розв’язання наукової задачі, що полягає у підвищенні енергетичної ефективності ступеня відцентрового насоса. В якості шляху розв’язання цієї задачі розглядається можливість створення ступенів із суттєво більшим напором при тих самих геометричних розмірах, величинах витрати і швидкості обертання. На основі огляду науково-технічної інформаціі була обгрунтована актуальність теми дослідження, сформульовані його мета і задачи. Розв’язання наукової задачі полягає у поєднання різних способів впливу на геометрію лопатевої ґратки робочих коліс: використання дво
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Conference papers on the topic "Improved blade grid"

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Min, Byung-Young, Isaac Wilbur, Sandeep Agarwal, et al. "Toward Improved UH-60A Blade Structural Loads Correlation." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12762.

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This study is focused on the improvement of UH-60A blade structural loads correlation with flight and wind-tunnel test data. The blade airloads prediction has been proven to be reasonably good from past studies. However, the blade structural loads, especially the edgewise bending moment, were poorly predicted, and these are the subject of the current study. Several variations of modeling effort have been examined. This includes the drive-train model, refined grid, lag-damper model variation, hub impedance with test stand, tunnel wall, and dis-similar blades. The drive-train and refined grid sh
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Peng, Li, Zhao Qi-Jun, and Zhu Qiu-xian. "CFD Calculations on the Unsteady Aerodynamic Force of Tilt-rotor in Conversion Mode." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9422.

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In order to calculate the unsteady aerodynamic force of tilt-rotor in conversion mode, VBM (Virtual Blade Model), RBM (Real Blade Model) and HBM (Hybrid Blade Model) are established respectively. A new multi-layer moving-embedded grid technique is presented to reduce the numerical dissipation of the tilt-rotor wake. In this method, grid generated abound the rotor accounts for rigid blade motions and a new searching scheme is implemented to search suitable donor elements in moving-embedded grids to translate information between the viscous flow and inviscid flow zones. In these CFD methods, a d
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Bain, Jeremy. "Computational Comparisons between FW-H and Direct Acoustic Predictions." In Vertical Flight Society 72nd Annual Forum & Technology Display. The Vertical Flight Society, 2016. http://dx.doi.org/10.4050/f-0072-2016-11350.

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Acoustic calculations are made for a three blade single and dual rotors in hover using conventional acoustic analogy and directly from the CFD solver. The acoustic results directly from overset CFD solver with high order finite-difference schemes were able to produce remarkably similar results to the acoustic analogy solver out to ten radii. In the near field, the results directly from the solver were substantially higher than the acoustic analogy calculations. The off body grid density was increased to improve the resolution at up to ten radii away from the rotor. The computed results showed
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Han, Yi, Yong Dan, and Jayanarayanan Sitaraman. "Analysis of Vertical Axis Wind Turbine Aerodynamics by Using a Multi-Fidelity Approach." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9685.

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This paper compares several methods for predicting the vertical axis wind turbine's aerodynamic performance, loading patterns as well as wake system behind the turbine. Three distinct aerodynamic prediction methodologies are implemented and compared with each other. One method is a low complexity analysis that improves the double-multiple streamtube model which is based on the traditional Blade Element Momentum theory. Another method is a medium complexity analysis which utilizes a potential flow model based on the calculation of the velocity field through the influence of the near wake system
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Coder, James, and Norman Foster. "Structured, Overset Simulations for the 1st Rotor Hub Flow Workshop." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-11999.

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Structured, overset computational fluid dynamics methods are used to simulate a water-tunnel experiment of flow over a rotating, 4-bladed rotor hub at Reynolds numbers near that of full scale. A hybrid RANS/LES method is employed with fifth-order discretization of convective flux terms and second-order time integration to resolve largescale turbulent flow features in the wake. Preliminary simulations on a baseline grid system revealed inadequate grid resolution in the wake region along with contamination from inflow and outflow boundaries being too close to the region of interest. An improved
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Wake, Brian, Stephen Makinen, C. Reimann, Byung-Young Min, and Edward Reed. "Investigation of the Rotor Stall Boundary Using CFD/CSD Analysis for Passive Rotor Systems." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10132.

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Coupled computational fluid dynamics and structural dynamics methods offer the potential to significantly improve the ability to predict helicopter rotor performance and unsteady loads. Accurate performance and unsteady loads predictions are necessary for the optimal design of the rotor dynamic components and blades. High-thrust and extreme maneuvering conditions, which are important for design, are especially challenging for the analysis tools to predict accurately due to dynamic stall and its strong coupling with the structural dynamics. Evaluation of complex features such as highly 3D tip s
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Zhao, Guo-qing, and Qi-jun Zhao. "Dynamic Stall Control on Rotor Airfoil via Combination of Synthetic Jet and Droop Leading-Edge." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10097.

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A novel strategy of dynamic stall control for rotor airfoil via combinational method by using variable-droop leading edge (VDLE) and synthetic jet is numerically investigated. As foundations, body-fitted grids around oscillatory rotor airfoil with VDLE are regenerated by reconstruction of airfoil and solution of Poisson equations, and the unsteady flowfield around airfoil is simulated by solving RANS equations. To improve the computational accuracy and efficiency, the ROE-MUSCL scheme, k-ε SST turbulence model and implicit LU-SGS scheme are adopted. Additional, a suction/blowing type boundary
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Singh, Puneet, and Peretz Friedmann. "A Computational Fluid Dynamics Based Viscous Vortex Particle Method for Coaxial Rotor Interaction Calculations." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12002.

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The coaxial rotor in hover and forward flight experiences complex unsteady aerodynamic interaction effects. Standard methods used for isolated rotor analysis are not adequate for obtaining the unsteady loads and wake. More accurate and computationally efficient approaches are required. The viscous vortex particle approach based on the Lagrangian formulation of the incompressible Navier-Stokes equations is a grid free method suitable for capturing the vortex wake interaction over long distances. The rational function approximation of unsteady airfoil loads from a CFD database is used to reduce
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O¨ksu¨z, O¨zhan, and I˙brahim Sinan Akmandor. "Turbine Blade Shape Aerodynamic Design Using Artificial Intelligence." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68094.

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This paper describes a fast, efficient, robust, and automated design method used to aerodynamically optimize 3D gas turbine blade shapes implementing artificial intelligence. The design objectives are maximizing the aerodynamic efficiency and torque so as to reduce the weight and size and cost of the gas turbine engine. The procedure described here will allow a rapid, practical and low cost design that will answer the need of gas turbine industry. A 3-Dimensional steady Reynolds Averaged Navier Stokes solver is coupled with an automated unstructured grid generation tool. The solver is verified
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Matsui, Takanori, Tomohiro Fukui, and Koji Morinishi. "Computational Fluid Dynamics to Assess the Blade Effect of a New Savonius Rotor for Improvement of the Output Power Coefficient." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5001.

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Abstract The output power coefficient of the Savonius rotor should be improved for better practical applications. So far, new Savonius rotor has been developed to improve the minimum output coefficient by adding semi-elliptical blade. Thus, the purpose of this research is to investigate the influence of the additional semi-elliptical blade’s position on the output coefficient. Flow around the rotor was simulated by using the regularized lattice Boltzmann method. The virtual flux method was used to express the shape of the rotor on a Cartesian grid, and the multi-block method was used for local
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