Results 11 to 20 of about 1,609 (213)
Understanding of tip clearance flow structure in high speed mixed flow compressor
Propulsion and Power Research, 2023 This paper addresses the necessity to make a physical interpretation of a highly complex three-dimensional tip clearance flow field study for high-speed mixed-flow compressor having stage exit static pressure to inlet total pressure ratio of 3.8 with 39 ...
Hemant Kumar, Chetan S. Mistry
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Aerospace, 2023 The accurate prediction of tip leakage flow is the premise for flow mechanism analysis and compressor performance optimization. The detached eddy simulation (DES) method, which compromises cost and accuracy, has excellent potential for a high Reynolds ...
Shiyan Lin, Ruiyu Li, Limin Gao, Ning Ge
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International Journal of Aerospace Engineering, 2021 In the present paper, the steady RANS (Reynolds-Averaged Navier-Stokes) simulations based on our independently developed CFD (Computational Fluid Dynamics) solver NUAA-Turbo 2.0, are carried out to investigate the shock wave/tip leakage vortex (SW/TLV ...
Yan Xue, Ning Ge
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Applied Sciences, 2021 In modern turbine rotors, tip-leakage flow is a common phenomenon that accounts for about 1/3 of the stage loss. Studies show that as the imposed load increases, a shock wave appears in the tip region, which causes a significant interference on the ...
Zuojun Wei +4 more
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Mind the gap - tip leakage vortex in axial turbines [PDF]
IOP Conference Series: Earth and Environmental Science, 2014 The tendency of designing large Kaplan turbines with a continuous increase of output power is bringing to the front the cavitation erosion issue. Due to the flow in the gap between the runner and the discharge ring, axial turbine blades may develop the so called tip leakage vortex (TLV) cavitation with negative consequences.
Dreyer, M. +3 more
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Investigation of the groove effect on the tip leakage vortex flow
IOP Conference Series: Earth and Environmental Science, 2021 Abstract The groove effect on the tip leakage vortex around a NACA0009 hydrofoil was studied by numerical method. The results show that, as the groove angle is 45°, the groove could enhance the turbulence kinetic energy around the TLV, weaken the TLV strength and improve the pressure in the TLV core, resulting in an efficient suppression
Zhaodan Fei, Rui Zhang, Hui Xu, Tong Mu
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Large Eddy Simulation of Hydrofoil Tip Leakage Vortex
Journal of Physics: Conference Series, 2023 Abstract The axial-flow turbomachinery is important in water supply and drainage. However, there is a gap between the blade tip and the casing, which is easy to cause tip leakage vortex. Tip leakage of axial-flow turbomachinery has bad impact on the operation stability.
Zilong Hu +5 more
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Energy Performance and Flow Patterns of a Mixed-Flow Pump with Different Tip Clearance Sizes
Energies, 2017 Tip clearance between blade end and shroud is inevitable in pump operation and of great importance on pump energy performance and pressure fluctuation. As the tip clearance size increases, the head and efficiency of the mixed flow pump drop accordingly ...
Yabin Liu, Lei Tan, Yue Hao, Yun Xu
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Fluids, 2022 The multiphase rotodynamic pump is widely used in petroleum and gas exploitation, and blade tip clearance may cause flow instability and performance deterioration.
Weihua Sun +3 more
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Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor
Science Progress, 2020 Casing pressure measurements and Stereoscopic Particle-Image Velocimetry (SPIV) measurements are used together to characterize the behavior of the rotor tip leakage flow at both the design and near-stall conditions in a low-speed multistage axial ...
Jun Li, Jun Hu, Chenkai Zhang
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