Results 61 to 70 of about 41,220 (167)
On the modification of tip leakage noise sources by over-tip liners
Physics of FluidsOver-Tip-Rotor (OTR) liners have been investigated over the last decades as a technology to further reduce fan broadband noise in turbofan engines. The suppression of noise with OTR liners is attributed to conventional attenuation of acoustic waves and source modification effects.
Sergi Palleja-Cabre +2 more
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Propulsion and EnergyTip leakage loss is a significant source of aerodynamic loss in the turbine rotor and can be controlled by using a cavity tip. In this paper, three configurations with cutback rims are numerically investigated to control the formation and development of ...
Weihao Zhang +3 more
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Tip-leakage-flow excited unsteadiness and associated control
Physics of FluidsTip leakage flow in turbomachinery inherently generates intense unsteady features, named self-excited unsteadiness, which significantly affects the operating stability, aerodynamic efficiency, and noise but has not been well understood. A zonalized large eddy simulation is employed for a linear cascade, with wall-modeled large eddy simulation active ...
Yabin Liu +4 more
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A Coandă-Surface-Assisted Ejector as a Turbine Tip Leakage Mitigator
International Journal of Turbomachinery, Propulsion and PowerThis paper presents an experimental and computational investigation of novel, ejector-based, Coandă-surface-assisted tip leakage mitigation schemes.
Gohar T. Khokhar, Cengiz Camci
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Energy performance and flow characteristics of a multiphase pump with different tip clearance sizes
Advances in Mechanical Engineering, 2019 Deep sea oil resources worldwide possess great potential for exploration; however, multiphase medium technology requires urgent development. The multiphase pump has achieved great success as one of the most advanced machinery in underwater oil and gas ...
Jinsong Zhang +3 more
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Experimental investigation of the tip leakage flow in a low-speed multistage axial compressor. [PDF]
Sci Prog, 2020 Li J, Hu J, Zhang C.
europepmc +1 more source
Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam Turbines
MachinesThis study aims to elucidate the mechanisms by which tip seal leakage flow induces steam excitation, thereby enhancing the operational safety of steam turbines.
Pan Li +4 more
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Control of Tip Leakage Flow in Axial Flow Compressor Cascade by Suction on the Blade Tip
Journal of Applied Fluid Mechanics, 2018 One of the important ways of improving axial compressor performance is to control the tip leakage flow near the endwall region. Numerical computations were conducted to investigate the impact of blade tip suction on the axial compressor cascade ...
X. Mao, B. Liu, T. Tang
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The non-dimensional parameters influencing tip leakage noise
Journal of Fluid MechanicsTip leakage noise is one of the least understood noise sources in turbomachinery, arising from the interactions between the tip leakage flow, blade tips and casing boundary layer. This study employs experimental and parametric investigations to systematically identify three key non-dimensional parameters that govern tip leakage noise: the angle of ...
Ivan Saraceno +2 more
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Study on the Sealing Structure of Scroll Tooth of an Oil-free Scroll Compressor
Zhileng xuebao, 2020 A novel type of radial combined sealing structure was proposed to improve the end-face sealing of wraps between fixed and orbiting scrolls. Geometry and engineering fluid mechanics were considered to develop an algorithm for determining leakage from the ...
Wang Jianji, Liu Tao
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