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Thematische Bibliographien / Damping of pressure pulsations / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Damping of pressure pulsations“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Ma, Quyang, Zhenhuan Wu, Guoan Yang, Yue Ming, and Zheng Xu. "Pulsation suppression in a reciprocating compressor piping system using a two-tank element." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 232, no. 4 (2017): 427–37. http://dx.doi.org/10.1177/0954408917713436.

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Gas pulsations excited by reciprocating compressors could introduce severe vibrations and noise in piping systems. When pulsating gas flows through the reducers, the changes in flow characteristics, such as velocity and damping coefficient, will affect the pressure pulsations. To circumvent these constraints, a two-tank element is introduced to control the gas pulsation that is still strong in the piping system with a surge tank. Installing another surge tank to form a two-tank element is more flexible and costs lower than replacing the original surge tank with a larger one. In this work, a th

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Himr, Daniel, Vladimír Habán, and Simona Fialová. "Influence of Second Viscosity on Pressure Pulsation." Applied Sciences 9, no. 24 (2019): 5444. http://dx.doi.org/10.3390/app9245444.

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A mathematical model of pulsating flow is proposed in the paper. The model includes more accurate description of energy dissipation, so it allows, for example, better stability analysis of water power plant control and more effective operation. Flow in a pipeline system is usually treated as a one-dimensional flow. This is also applied for more difficult cases of the Newtonian and non-Newtonian liquids simulations in the rigid or flexible pipes. Computational simulations of pressure pulsations in pipelines often predict lower damping than what the experimental results show. This discrepancy ca

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3

Rabsztyn, Dominik, and Klaudiusz Klarecki. "Model and experimental analysis of influence of selected parameters of hydraulic line on displacement pump pressure pulsations damping." Journal of Konbin 54, no. 1 (2024): 1–20. http://dx.doi.org/10.5604/01.3001.0054.4459.

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Among practitioners, the prevailing view is that the use of a discharge line made of an elastic hose allows users not only to isolate the pump unit from the rest of the system for transferred vibrations, but also to obtain the passive damping of pressure pulsation generated by the pump flow rate pulsation. The objective of the model and experimental research described in this article was to confirm or disprove the common opinion that a discharge line with an elastic hose is a sufficient element to damp the pressure pulsation caused by the displacement pump. The article presents experimental st

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Li, Ruichuan, Dongrun Li, Zhengyu Li, Tong Wu, and Jikang Xu. "Research on the Effect of Damping Grooves on the Pressure and Cavitation Characteristics of Axial Piston Pumps." Processes 13, no. 5 (2025): 1274. https://doi.org/10.3390/pr13051274.

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The damping groove structure of the port plate plays a crucial role in the pulsation suppression, vibration reduction, and noise optimization of the piston pump. Different damping groove structures have a significant impact on the flow distribution process during the normal operation of the port plate, affecting the pump outlet flow and pressure pulsations, which in turn influence the noise level of the piston pump. Therefore, the damping groove in the piston pump is one of the key structures influencing the pump’s pressure and cavitation behavior. To address the pressure shocks and oscillatio

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Ma, Quyang, Zhenhuan Wu, Mengjun Li, and Guoan Yang. "Pulsation attenuation in a reciprocating compressor piping system using a volume-perforated pipe-volume suppressor." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 17 (2017): 3074–84. http://dx.doi.org/10.1177/0954406217729422.

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A volume-perforated pipe-volume suppressor is introduced to study its performance in attenuating pressure pulsations. On the basis of plane wave theory, the work developed a mathematical model to predict the distribution of pressure pulsations in a reciprocating compressor piping system with the proposed suppressor. The theoretical predictions were verified through experiments and three-dimensional fluid dynamics transient simulations, and good agreements were attained. Results proved that the pressure pulsations were attenuated significantly when the suppressor was used. In the frequency doma

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Himr, Daniel, and Vladimir Haban. "Damping of Self-Excited Pressure Pulsations in Petrodiesel Pipeline." Applied Mechanics and Materials 630 (September 2014): 375–82. http://dx.doi.org/10.4028/www.scientific.net/amm.630.375.

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A pumping station in a fuel storage suffered from pressure pulsations in a petrodiesel pipeline. Check valves protecting the station against back flow made a big noise when disc hit a seat. Due to employees complaints we were asked to solve the problem, which could lead to serious mechanical problems. Pressure measurement in the pipeline showed great pulsations, which were caused by self-excited oscillation of control valves at the downstream end of pipeline. The operating measurement did not catch it because of too low sampling frequency. One dimensional numerical model of the whole hydraulic

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Himr, Daniel, Vladimír Habán, and David Štefan. "Inner Damping of Water in Conduit of Hydraulic Power Plant." Sustainability 13, no. 13 (2021): 7125. http://dx.doi.org/10.3390/su13137125.

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The operation of any hydraulic power plant is accompanied by pressure pulsations that are caused by vortex rope under the runner, rotor–stator interaction and various transitions during changes in operating conditions or start-ups and shut-downs. Water in the conduit undergoes volumetric changes due to these pulsations. Compression and expansion of the water are among the mechanisms by which energy is dissipated in the system, and this corresponds to the second viscosity of water. The better our knowledge of energy dissipation, the greater the possibility of a safer and more economic operation

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Britsyn, S. V., M. V. Ryabinin, and S. E. Semenov. "OSCILLATION DAMPER CALCULATION BASED ON THE ELECTRO HYDRAULIC ANALOGY." Spravochnik. Inzhenernyi zhurnal, no. 275 (2020): 17–24. http://dx.doi.org/10.14489/hb.2020.02.pp.017-024.

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The method of the synthesis and the pressure fluctuations damping calculation based on the electro-hydraulic analogy is proposed. The mathematical model describing the processes of unsteady fluid flow through the device is developed. Using the composed transfer function and its approximation, the oscillation damper parameters identification to reduce the outlet pressure pulsations in the triplex plunger pump is carried out.

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Lepeshkin, A. A., L. A. Berdnikov, M. G. Korzhachkin, and V. A. Panov. "Damping of pressure pulsations in the fuel system of the motor." IOP Conference Series: Materials Science and Engineering 1086, no. 1 (2021): 012011. http://dx.doi.org/10.1088/1757-899x/1086/1/012011.

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10

Lato, T., and A. Mohany. "Passive damping of pressure pulsations in pipelines using Herschel-Quincke tubes." Journal of Sound and Vibration 448 (May 2019): 160–77. http://dx.doi.org/10.1016/j.jsv.2019.02.020.

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11

TEMKIN, S. "Radial pulsations of a fluid sphere in a sound wave." Journal of Fluid Mechanics 380 (February 10, 1999): 1–38. http://dx.doi.org/10.1017/s0022112098003401.

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This paper presents analytical results for the temperature and pressure fluctuations in a droplet or bubble pulsating in a sound wave, the related damping coefficients, as well as the corresponding sound attenuation coefficients for dilute suspensions. The study is limited to small-amplitude motions but includes the effects of compressibility and heat conduction in the fluid outside the particle. Results are obtained for both average and surface values of the particle's temperature and pressure fluctuations that are applicable to droplets in gases and liquids, and to gas bubbles in liquids. In

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12

Lato, T., A. Mohany, and M. Hassan. "A passive damping device for suppressing acoustic pressure pulsations: The infinity tube." Journal of the Acoustical Society of America 146, no. 6 (2019): 4534–44. http://dx.doi.org/10.1121/1.5139886.

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13

Dindorf, R., and P. Woś. "Vibration damping performance of the electrohydraulic self-leveling unit of the tracked platform of robotic bricklaying combine." IOP Conference Series: Materials Science and Engineering 1247, no. 1 (2022): 012020. http://dx.doi.org/10.1088/1757-899x/1247/1/012020.

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Abstract The study proposes the use of a semi-active hydro-pneumatic spring damper unit for damping pressure pulsations in the servohydraulic leveling system of an electrohydraulic self-leveling unit of a tracked platform of a robotic bricklaying combine (RBC). The semi-active hydro-pneumatic spring damper unit consisted of a gas spring in the hydro-pneumatic accumulator and a controlled hydraulic damping valve. A model of a hydro-pneumatic accumulator with a connection tube was presented, using lumped hydraulic elements in the form of resistance, inductance, and capacitance (RLC). This model

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14

HAYASHI, Itsuro, and Shigehiko KANEKO. "817 Damping Characteristics of Pressure Pulsations in Piping Systems Induced by a Centrifugal Compressor." Proceedings of the Dynamics & Design Conference 2007 (2007): _817–1_—_817–6_. http://dx.doi.org/10.1299/jsmedmc.2007._817-1_.

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15

Cyklis, Piotr, and Przemysław Młynarczyk. "Passive pressure pulsation damping using shaped nozzles." Scientific Letters of Rzeszow University of Technology - Mechanics 31, no. 86(3/2014) (2014): 319–26. http://dx.doi.org/10.7862/rm.2014.35.

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16

Yang, Liu, Haijun Wang, Xiuwei Yang, and Huokun Li. "Study of the inhibitory effect of a soft cushion on the propagation of pressure pulsation in pumped storage power stations." Earthquake Engineering and Resilience 2, no. 3 (2023): 301–15. http://dx.doi.org/10.1002/eer2.51.

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AbstractHigh‐frequency pressure pulsations are hydraulic phenomena that are frequently observed in pumped storage power stations. These pulsations can propagate through the steel pipes, concrete lining, and the surrounding rock system, which in turn may have detrimental effects on the environment, such as noise pollution, and relocation of the local residents. This paper proposes a vibration‐damping concept that involves wrapping a local soft cushion layer outside the buried steel pipe; this layer could partially eliminate the pressure fluctuations in the headrace tunnel, thereby reducing the

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17

HUANG, Qi, Lei DING, Xinquan SHA, et al. "Experimental study of effects of buffer tank volume on pressure pulsation in valved linear compressor's pipe system at different frequencies." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 42, no. 2 (2024): 286–94. http://dx.doi.org/10.1051/jnwpu/20244220286.

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The valved linear compressor (VLC) is an essential part of the Joule-Thompson (J-T) throttling cryocooler in the liquid helium temperature region. The pressure pulsation may cause the fluctuation of the temperature and cooling capacity of the cryocooler, thus affecting its temperature stability. To measure the pressure pulsation of the VLC's pipe system, the mathematical model of pressure pulsation in the buffer tank of the VLC was established with the transfer matrix method based on the plane wave theory. The quantitative representation of the pulsating mass flow of the VLC was obtained with

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18

Hayashi, I., and S. Kaneko. "Pressure pulsations in piping system excited by a centrifugal turbomachinery taking the damping characteristics into consideration." Journal of Fluids and Structures 45 (February 2014): 216–34. http://dx.doi.org/10.1016/j.jfluidstructs.2013.11.012.

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19

Chukalin, Andrey, Vladislav Kovalnogov, Vyacheslav Sherkunov, and Oleg Savelov. "The Influence of Laminarizers on the Turbulent Boundary Layer and Prediction of Effective Flow Conditions around Surfaces." Problems of the Regional Energetics, no. 2(66) (May 2025): 145–54. https://doi.org/10.52254/1857-0070.2025.2-66.12.

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The development of effective methods for boundary layer laminarization is a fundamental task for the efficient and reliable operation of power equipment. The main objective of the work is to study the effect of a damping surface on flows in the boundary layer occurring in complex gas-dynamic conditions and to implement a method for predicting effective conditions for flow past damping surfaces. The implementation of the mathematical model allows performing calcula-tions and creating a database for analyzing and selecting the most effective conditions for using a damping surface. To achieve the

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20

Murphy, Simon J., Hideyuki Saio, Masahide Takada-Hidai та ін. "On the first δ Sct–roAp hybrid pulsator and the stability of p and g modes in chemically peculiar A/F stars". Monthly Notices of the Royal Astronomical Society 498, № 3 (2020): 4272–86. http://dx.doi.org/10.1093/mnras/staa2667.

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ABSTRACT Strong magnetic fields in chemically peculiar A-type (Ap) stars typically suppress low-overtone pressure modes (p modes) but allow high-overtone p modes to be driven. KIC 11296437 is the first star to show both. We obtained and analysed a Subaru spectrum, from which we show that KIC 11296437 has abundances similar to other magnetic Ap stars, and we estimate a mean magnetic field modulus of 2.8 ± 0.5 kG. The same spectrum rules out a double-lined spectroscopic binary, and we use other techniques to rule out binarity over a wide parameter space, so the two pulsation types originate in o

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21

He, Dian, Nan Xu, Haocen Hong, Bin Zhang, Shunhai Xu, and Huayong Yang. "Research on Multi-Objective Optimization of Low Pulsation Unloading Damping Groove of Axial Piston Pump." Processes 12, no. 7 (2024): 1378. http://dx.doi.org/10.3390/pr12071378.

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The high- and low-pressure switching of the axial piston pump is realized by the structure of the valve plate, and the buffer-groove structure on the valve plate is very important to reduce the pressure shock and flow fluctuation. In order to optimize the structural parameters of the buffer tank of the piston pump, the influence of the triangular-groove structure on the outlet pressure–flow characteristics was analyzed, and the low-pulsation buffer-groove structure was designed. First, the relationship between the structure of the triangular buffer tank and the output pressure and flow charact

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22

Zhang, Yanjun, Hongxin Zhang, Jingzhou Yang, et al. "Research on Distribution of Flow Field and Simulation of Working Pulsation Based on Rotating-Sleeve Distributing-Flow System." Modelling and Simulation in Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/1015494.

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To solve problems of leakage, vibration, and noise caused by disorders of flow field distribution and working pulsation in the rotating-sleeve distributing-flow system, governing equations of plunger and rotating sleeve and computational fluid dynamics (CFD) model are developed through sliding mesh and dynamic mesh technology to simulate flow field and working pulsation. Simulation results show that the following issues exist: obviously periodic fluctuation and sharp corner in flow pulsation, backward flow when fluid is transformed between discharge and suction, and serious turbulence and larg

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Shaik Chand Mabhu Subhani and N.Vijay Kumar. "Static and Model Analysis on Pneumatic Suspension by using Ansys Software." International Journal for Modern Trends in Science and Technology 6, no. 12 (2020): 384–89. http://dx.doi.org/10.46501/ijmtst061272.

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During the tractor movement, with being attached to the hitch-system working equipment over Rough road surfaces oscillation of the machine take place. These oscillations are a reason of pressure pulsations in the hydraulic hitch-system. The pressure pulse reduction in the tractor Hitch-system is important for increasing of the system components lifetime. Pressure oscillation damping in the tractor hydraulic hitch-system can reduce overall system oscillations and improve the driving control. The design of spring in suspension system is very important. In this project a shock absorber is designe

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HAYASHI, Itsuro, and Shigehiko KANEKO. "Pressure Pulsations in Piping Systems Excited by a Centrifugal Compressor (2nd Report, Effect of Operating Conditions on Damping Characteristics)." Transactions of the Japan Society of Mechanical Engineers Series C 74, no. 739 (2008): 650–57. http://dx.doi.org/10.1299/kikaic.74.650.

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25

Młynarczyk, Przemysław, and Piotr Cyklis. "The estimation of the pressure pulsation damping coefficient of a nozzle." Journal of Sound and Vibration 464 (January 2020): 115002. http://dx.doi.org/10.1016/j.jsv.2019.115002.

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26

Li, Yelin, Youxin Luo, and Xiao Wu. "Impact System Dynamic Characteristics of Hydraulic Rock Drill Based on an Overlapped Reversing Valve." Shock and Vibration 2018 (September 19, 2018): 1–11. http://dx.doi.org/10.1155/2018/8963750.

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For the phenomenon of a hydraulic rock drill based on an underlapped reversing valve, the mechanical structure of the overlapped reversing form was proposed, which affected the pressure pulsation of the impact system, and motion of the impact piston was analyzed. The model of a hydraulic rock drill was built based on Newton’s laws. The initial lead size of the reversing point was calculated by the equilibrium position of the damping piston and final velocity of the impact piston. The size of the overlapped reversing valve was designed and the best impact interval was calculated, according to p

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Houdek, G., M. N. Lund, R. Trampedach, J. Christensen-Dalsgaard, R. Handberg, and T. Appourchaux. "Damping rates and frequency corrections of Kepler LEGACY stars." Monthly Notices of the Royal Astronomical Society 487, no. 1 (2019): 595–608. http://dx.doi.org/10.1093/mnras/stz1211.

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ABSTRACT Linear damping rates and modal frequency corrections of radial oscillation modes in selected LEGACY main-sequence stars are estimated by means of a non-adiabatic stability analysis. The selected stellar sample covers stars observed by Kepler with a large range of surface temperatures and surface gravities. A non-local, time-dependent convection model is perturbed to assess stability against pulsation modes. The mixing-length parameter is calibrated to the surface-convection-zone depth of a stellar model obtained from fitting adiabatic frequencies to the LEGACY observations, and two of

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Bach, David, Tom Masselter, and Thomas Speck. "Damping of Pressure Pulsations in Mobile Hydraulic Applications by the Use of Closed Cell Cellular Rubbers Integrated into a Vane Pump." Journal of Bionic Engineering 14, no. 4 (2017): 791–803. http://dx.doi.org/10.1016/s1672-6529(16)60444-4.

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29

Ion, PANA. "Dynamic simulation of a reciprocating compressor in LMS Amesim program." Scientific Bulletin of Naval Academy XXIV, no. 1 (2021): 29–40. http://dx.doi.org/10.21279/1454-864x-21-i1-003.

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The evolution of calculation programs currently allows the modelling of engineering systems with a high degree of accuracy, reducing the simplifying assumptions used in the construction of models. The paper presents a combined model of a pulsation damping system and a cooling system of a reciprocating compressor. The numerical simulation uses the LMS Amesim program, the academic license offered free of charge by Siemens to teachers and students. The model with a large number of tracked variables allows the analysis of adjustments and the effects of changes to the conditions in the compression

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Et al., Navruzov Kuralbay. "Pulsing Flows of a Viscous Incompressible Liquid in a Pipe with Elastic Walls." Psychology and Education Journal 58, no. 2 (2021): 1436–44. http://dx.doi.org/10.17762/pae.v58i2.2293.

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As you know, the recent intensive introduction into practice of flexible pipelines made of polymer synthetic materials, pulsating fluid flow in elastic pipes is of great importance. As you know, the recent intensive introduction into practice of flexible pipelines made of polymer synthetic materials, pulsating fluid flow in elastic pipes is of great importance. By solving the problem, the necessary hydrodynamic parameters will be determined, such as pressure distributions, velocities, flow rates, the speed of propagation of the pulse wave pressure and their decay. For the first time in this ar

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Sun, Fengyong, and Haibo Zhang. "A research on the compressor blade tip pressure modeling and stall detection measure." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 230, no. 14 (2016): 2654–60. http://dx.doi.org/10.1177/0954410016629703.

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A new compressor rotational stall detection algorithm is proposed in this paper, and a well monotonicity exists in the correlation coefficient calculated by the algorithm and compressor surge margin. In order to reconstruct the compressor blade pressure, a trustworthy digital compressor blade pressure model is built. Specially, the model consists of three sub-models, the blade duct pressure model, rotational stall pulsation pressure model, and corrected rotational stall damping model. Simulation results indicate the effectiveness of the stall detection algorithm and compressor stochastic press

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Su, Xin Ping, Shi Tong Liu, Fu Ming Yin, Guang Kun Nie, and Wei Sun. "The Calculation and Simulate Research of the Natural Frequency of Liquid Flow on Piping Networks of Multi-Pulse Sources." Applied Mechanics and Materials 137 (October 2011): 250–55. http://dx.doi.org/10.4028/www.scientific.net/amm.137.250.

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The pressure resonance problem impelled by hydraulic pulsation power in piping networks is studied in this thesis. Through theoretical analyzing and computer simulating to the flow variation of multi-pulse sources accumulation, two concepts: the variable initial angle by equal probability and flow pulsation rare, are introduced. Some useful conclusions are also obtained. Most of piping networks vibration in engineering is aroused by the medium pressure pulsation. Destructive violent vibration is set off by the simulation of pressure pulsation when resonant occurred. In order to reduce the vibr

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Wang, Xiaowei, and Wenxi Liu. "Study on the Characteristics of Gas Spring-Damping Modified Model Bladder-Damper Based on Dynamic Mesh Technology." Journal of Physics: Conference Series 2650, no. 1 (2023): 012048. http://dx.doi.org/10.1088/1742-6596/2650/1/012048.

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Abstract This paper addresses the existing difficulty in quantitatively analyzing and calculating the attenuation effect of a specific type of vibration control device, referred to as a “Bladder-Damper”. In response, a modified version of the “Gas Spring-Damping” model specifically tailored for this device has been proposed. Models involving both series and parallel connections have been established to support our work. Dynamic mesh technology has been used to simulate the damping characteristics of the Bladder-Damper, successfully resolving both finite element fluid calculation divergence iss

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Druzhinin, A. A., A. P. Kutrakov, and R. V. Zinko. "Silicon whisker pressure sensors for noise reduction in silencers." Технология и конструирование в электронной аппаратуре, no. 1-2 (2021): 28–32. http://dx.doi.org/10.15222/tkea2021.1-2.28.

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The article contains the results of research and development of a system for active noise damping of an automobile engine. The main source of noise from a running engine is exhaust noise. The frequency spectrum of this sound has a pronounced low-frequency character, which explains its weak absorption when the sound is propagating in open spaces. A possible solution to this problem is to use an active system for suppressing the resonant frequencies of the muffler using strain gauges to read the primary information about the dynamic processes that determine the noise level. It is for such active

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Cyklis, Piotr, and Przemysław Młynarczyk. "The CFD Based Estimation of Pressure Pulsation Damping Parameters for the Manifold Element." Procedia Engineering 157 (2016): 387–95. http://dx.doi.org/10.1016/j.proeng.2016.08.381.

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Cao, Wenbin, Yinshui Liu, Jie Dong, Zhuang Niu, and Youcheng Shi. "Research on Pressure Pulsation Characteristics of Gerotor Pump for Active Vibration Damping System." IEEE Access 7 (2019): 116567–77. http://dx.doi.org/10.1109/access.2019.2936489.

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Carraro, Mattia, Jaina Negandhi, Jafri Kuthubutheen, et al. "Attenuating Cardiac Pulsations within the Cochlea: Structure and Function of Tortuous Vessels Feeding Stria Vascularis." ISRN Otolaryngology 2013 (May 19, 2013): 1–7. http://dx.doi.org/10.1155/2013/941757.

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The mammalian ear has an extraordinary capacity to detect very low-level acoustic signals from the environment. Sound pressures as low as a few μPa (−10 dB SPL) can activate cochlear hair cells. To achieve this sensitivity, biological noise has to be minimized including that generated by cardiovascular pulsation. Generally, cardiac pressure changes are transmitted to most peripheral capillary beds; however, such signals within the stria vascularis of the cochlea would be highly disruptive. Not least, it would result in a constant auditory sensation of heartbeat. We investigate special adaptati

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Gogstad, Peter Joachim, and Ole Gunnar Dahlhaug. "Evaluation of runner cone extension to dampen pressure pulsations in a Francis model turbine." IOP Conference Series: Earth and Environmental Science 49 (November 2016): 082019. http://dx.doi.org/10.1088/1755-1315/49/8/082019.

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Zaripov, Faiz A., Grigory I. Pavlov, Pavel V. Nakoryakov, and Oleg R. Sitnikov. "Experimental study of the oscillatory process in cylindrical pipes filled with gas-bubble liquid." Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy 8, no. 4 (2022): 81–94. http://dx.doi.org/10.21684/2411-7978-2022-8-4-81-94.

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In hydraulic systems, undamped oscillations often occur, the frequencies of which coincide with the natural frequencies of the elements of hydraulic systems. The resulting pressure pulsations in the liquid are harmful and can disrupt the operation of hydraulic systems and elements of its automation. The search for ways and methods to reduce the impact of wave and vibration processes on pipelines, as well as the creation of devices that ensure their implementation, is an urgent scientific and technical task. The paper proposes an original method of damping resonant vibrations by feeding gas bub

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Quaal, Susan J. "Quality Assurance in Hemodynamic Monitoring." AACN Advanced Critical Care 4, no. 1 (1993): 197–206. http://dx.doi.org/10.4037/15597768-1993-1015.

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Patient care management decisions frequently are based, at least in part, on hemodynamic indices. Accuracy in repeated measurement of hemodynamic parameters is therefore critical. It can be achieved only through a program of quality assurance (QA), which should include the following factors: static, dynamic, and validation of pulmonary artery wedge pressure (PAWP). The static QA factor consists of establishing an accurate reference point from which all subsequent measurements are made. The hemodynamic monitoring system must be able to transmit pulsating physiologic pressures to the transducer

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TSUKAMOTO, Koji, Masahiro KOIZUMI, and Masato SHINJI. "Estimation of Compressive Strength of Rocks Using Damping Pressure Pulsation of Hydraulic Rock Drill." Journal of the Society of Materials Science, Japan 68, no. 4 (2019): 366–73. http://dx.doi.org/10.2472/jsms.68.366.

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42

CHATZIDAI, N., Y. DIMAKOPOULOS, and J. TSAMOPOULOS. "Viscous effects on the oscillations of two equal and deformable bubbles under a step change in pressure." Journal of Fluid Mechanics 673 (March 1, 2011): 513–47. http://dx.doi.org/10.1017/s0022112010006361.

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According to linear theory and assuming the liquids to be inviscid and the bubbles to remain spherical, bubbles set in oscillation attract or repel each other with a force that is proportional to the product of their amplitude of volume pulsations and inversely proportional to the square of their distance apart. This force is attractive, if the forcing frequency lies outside the range of eigenfrequencies for volume oscillation of the two bubbles. Here we study the nonlinear interaction of two deformable bubbles set in oscillation in water by a step change in the ambient pressure, by solving th

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Ponomarov, Vladyslav. "ABOUT THE USE OF DIGITAL HYDRAULIC VALVES IN INDUSTRY." Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units, no. 1 (November 29, 2024): 95–98. https://doi.org/10.20998/2411-3441.2024.1.14.

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The article discusses digital hydraulic valves, which are an innovative alternative to traditional proportional analog valves. Digital hydraulics utilize a combination of simple, reliable, and inexpensive ON/OFF type valves, offering high precision in flow and pressure control through programmable logic controllers. The main advantage of such systems is the reduction in energy consumption, as they eliminate the need for constant pump operation and have no internal leakage. The article highlights the economic benefits of digital valves, including lower initial investments due to their lower cos

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Mironova, T. В., P. D. Rekadze, A. B. Prokofiev, and L. V. Rodionov. "Computational and experimental studies of a pressure pulsation damper for pipeline systems." VESTNIK of Samara University. Aerospace and Mechanical Engineering 23, no. 4 (2024): 144–54. https://doi.org/10.18287/2541-7533-2024-23-4-144-154.

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A generalized-structure analytical model of a pressure pulsation damper for pipeline systems is presented. The model was obtained using the four-pole method. The model is obtained in lumped and distributed parameters. The distributed-element model and finite element model are used for calculating the inherent characteristics of the pressure pulsation damper. The analytical distributed-element model takes into account the distribution parameters of the central inertial channel by introducing into the analytical model a matrix for the distributed element instead of the matrix of inertial resista

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Zhang, Chenchen, Dexun Zhang, Yuzhe Lu, Sheng Li, and Jian Ruan. "Research on flow and pressure pulsation optimization of roller piston pump with triangular damping groove." Flow Measurement and Instrumentation 106 (December 2025): 103000. https://doi.org/10.1016/j.flowmeasinst.2025.103000.

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Jiang, Jihai, and Zhongxun Liu. "Pressure characteristics of a novel double rotor hydraulic transformer." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 233, no. 9 (2019): 1182–94. http://dx.doi.org/10.1177/0959651818822392.

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The hydraulic transformer is the core component when it works with the common pressure rail system, which integrates the functions of the pump and the motor, and thus possesses sensitive pressure characteristics. The rotating speed has significant influence on the pressure characteristics of a hydraulic transformer while it has not been considered previously. In this study, aimed at improving the working performance, a novel double rotor hydraulic transformer is proposed and a comprehensive mathematical model considering the dynamic characteristics of the cylinder block is established. At the

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Azarova, Olga A. "Basics of Control of the Bow Shock Wave, Drag and Lift Forces, and Stability in a Steady Supersonic Flow Past an AD Body Using Permanently Operating Thermally Stratified Energy Deposition." Energies 15, no. 22 (2022): 8627. http://dx.doi.org/10.3390/en15228627.

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A new method of high-speed flow control using permanently operating thermally stratified energy deposition is presented. The paper focuses on the analysis of the dependence of the characteristics of a steady supersonic flow and an aerodynamic (AD) body on the temperature values in the layers of a stratified source and the possibility of making the transition from one steady flow mode to another by changing the temperature in the layers. A detailed visualization of the dynamics of the fields of density, pressure, temperature, and local Mach number is presented during the controlled establishmen

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Dindorf, Ryszard, Jakub Takosoglu, and Piotr Wos. "Review of Hydro-Pneumatic Accumulator Models for the Study of the Energy Efficiency of Hydraulic Systems." Energies 16, no. 18 (2023): 6472. http://dx.doi.org/10.3390/en16186472.

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This review article deals with hydro-pneumatic accumulators (HPAs) charged with nitrogen. The focus is on HPA models used in the study of the energy efficiency of hydraulic systems. Hydraulic circuits with HPA are presented along with their various applications for delivering the required volume of fluid, maintaining the required pressure, ensuring safe operation, safety stop, leak compensation, fluid volume change compensation, pulsation damping, and pressure shock absorption. A general regenerative hydraulic system and a general hybrid hydraulic system are also presented. The review focuses

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Longuet-Higgins, Michael S. "Resonance in nonlinear bubble oscillations." Journal of Fluid Mechanics 224 (March 1991): 531–49. http://dx.doi.org/10.1017/s0022112091001866.

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In two recent papers (Longuet-Higgins 1989a,b) the author showed that the shape oscillations of bubbles can emit sound like a monopole source, at second order in the distortion parameter ε. In the second paper (LH2) it was predicted that the emission would be amplified when the second harmonic frequency 2σn of the shape oscillation approaches the frequency ω of the breathing mode. This ‘resonance’ would however be drastically limited by damping due to acoustic radiation and thermal diffusion. The predictions were confirmed by further numerical calculations in Longuet-Higgins (1990a).Ffowcs Wil

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Banis, Kārlis. "The Effect of separated Expansion Chamber Parameters on Exhaust Pressure Oscillations in Single Cylinder Motorcycle Engine." Rural Sustainability Research 43, no. 338 (2020): 42–51. http://dx.doi.org/10.2478/plua-2020-0006.

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AbstractThis paper investigates the effect of separated exhaust expansion chamber parameters on pressure oscillations in spark-ignited internal combustion (IC) gasoline engines. It is known that exhaust expansion chambers are becoming increasingly more popular among both – original equipment (OE) and aftermarket equipment (AE) exhaust system manufacturers for performance-oriented motorcycles equipped with mainly single cylinder engines, but the companies are reluctant to reveal any detailed principles of operation of the mentioned expansion chambers. The subject of this research is the type of

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