Results 41 to 50 of about 44,613 (142)
Journal of Applied Fluid Mechanics, 2019 In the present study, the numerical analysis of blade tip geometry effect on the performance of a single-stage axial compressor has been the focus of attention. The studied geometries included a rotor with variable tip clearance. For the first model, the
M. Ostad, R. Kamali
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International Journal of Rotating Machinery, 2012 This paper presents a numerical investigation of the effects of a nonuniform tip clearance profile on the performance and flow field in a centrifugal compressor with a vaneless diffuser.
Yohan Jung +3 more
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Energies, 2017 The energy performance and radial force of a mixed flow pump with symmetrical and unsymmetrical tip clearance are investigated in this paper. As the tip clearance increases, the pump head and efficiency both decrease.
Yue Hao +5 more
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Blade Tips - Clearance and Its Control [PDF]
Mechanical Engineering, 2013 This article focuses on studying blade tip clearance phenomena. It is important to realize that to be freely turning, a blade (or a cantilevered stator) must have a clearance gap between its tip and the engine casing (or hub). Such clearances introduce aerodynamic losses, decreasing gas turbine efficiency.
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Tubomachinery blade vibration amplitude measurement through tip timing with capacitance tip clearance probes [PDF]
Sensors and Actuators A: Physical, 2005 Abstract Turbomachinery blade vibrations can cause high cycle fatigue (HCF), which reduces blade life. In order to observe this vibration a non-intrusive monitoring system is sought. The vibration can be detected by measuring blade tip timing since in the presence of vibration the blade timing will differ slightly from the passing time calculated ...
Lawson, Craig P., Ivey, Paul C.
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A Review of Tip Clearance in Propeller, Pump and Turbine
Energies, 2018 Propellers, pumps, and turbines are widely applied in marine equipment, water systems, and hydropower stations. With the increasing demand for energy conservation and environmental protection, the high efficiency and the stable operation of pumps and ...
Yabin Liu, Lei Tan, Binbin Wang
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Study of Tip Clearance Measurement System.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1994 Trial manufacture of a tip clearance measurement system with spark discharge has been conducted, through which the structure of this apparatus was clarified. The characteristics of spark gap between the probe and the blade that determines the measurement accuracy of this apparatus and the effect of UV irradiation were investigated.
Takayuki Watanabe, Masakatu Matsuki
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AIP Advances, 2022 Tip clearance inevitably exists in helico-axial flow multiphase pumps, which generates a great impact on flow characteristics. To select a reasonable tip clearance and improve the transporting efficiency, different tip clearances (Rtc = 0.5, 1.0, and 1.5
Haigang Wen +3 more
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Machines, 2022 In order to study the influence of tip clearance on the performance and energy dissipation of the axial-flow pump and the axial-flow pump as a turbine, and find the location of high dissipation rate, this study took an axial-flow pump model as its ...
Yanjun Li +4 more
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Modeling Tip Clearance Effects in Multistage Axial Compressors [PDF]
Journal of Turbomachinery, 1995 A variety of techniques for simulating the effects of rotor tip clearances in multistage axial compressors is discussed. Proper recognition of stage coupling and rematching effects is shown to be key to successful modeling of the overall behavior of actual engine compression systems.
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