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Blade by Blade Tip Clearance Measurement [PDF]

International Journal of Rotating Machinery, 2011
This paper describes a capacitance-based tip clearance measurement system which engineers have used in the most demanding turbine test applications.
A. G. Sheard
doaj   +2 more sources

Investigation on the Energy Loss Characteristics in Multiphase Pump Based on Entropy Production Theory

Science and Technology of Nuclear Installations
The tip clearance is an essential structure in multiphase pumps, and the vortex flow caused by the leakage at the tip of the blade disturbs the internal flow field of the pump, leading to energy losses, which in turn weaken the pump’s pressure-boosting ...
Zongku Liu, Guohong Wu, Jiaxiang Zhang, Jianglong Dou, Ce An, Bo Wang, Guangtai Shi   +6 more
doaj   +1 more source

Effect of the tip clearance on tip leakage vortex and pressure fluctuation characteristics in a helico-axial flow multiphase pump

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, Wenjuan Lv, Guangtai Shi, Zongku Liu   +3 more
doaj   +1 more source

Analysis of flow characteristics and pressure pulsation in impeller region of shaft tubular pump device with different tip clearances

AIP Advances
The shaft tubular pump device (STPD) impeller flow characteristics and occurrence regularity of tip clearance leakage (TCL) flow were investigated using a steady and unsteady three-dimensional numerical simulation with computational fluid dynamics as the
Shengjie Sun, Xiaoyu Jin, Zhikang Lin, Chunlou Shao, Hao Wang, Fan Yang   +5 more
doaj   +1 more source

An Optical Fiber Measurement System for Blade Tip Clearance of Engine

International Journal of Aerospace Engineering, 2017
The benefits of reducing the tip clearance have been receiving many scholars’ attention all the time, which bring turbine efficiency increasing, emissions reduction, payloads increasing, and mission range abilities extension.
Jia Binghui, He Lei
doaj   +1 more source

Impact of Channels Aspect Ratio on the Heat Transfer in Finned Heat Sinks with Tip Clearance. [PDF]

Micromachines (Basel), 2022
Martin E, Valeije A, Sastre F, Velazquez A.   +3 more
europepmc   +1 more source

Impact of Tip Clearance on the Flow Features and Blood Trauma of a Centrifugal Blood Pump Under Multiple Operating Conditions

IEEE Access
Blade tip clearance plays an important role in the hydraulic performance and hemocompatibility of centrifugal blood pumps, yet its effects across clinically relevant operating conditions, particularly off-design conditions, remain insufficiently ...
Junhui Zhu, Zehui Li, Weiping Lu, Jianping Tan, Zhe Gou   +4 more
doaj   +1 more source

Effect of impeller tip clearance on cavitation in an axial-flow pump

Engineering Science and Technology, an International Journal
Cavitation in axial-flow pumps reduces efficiency, induces noise and vibration, and causes wear on metallic components. The existence of a tip clearance, coupled with the high rotational speed of the impeller, creates a favorable condition for cavitation
Duc-Anh Nguyen, Mohammad Abu Shahzer, Wonchul Choi, Il-Soo Yoo, Jin-Hyuk Kim   +4 more
doaj   +1 more source

Different distances between central venous catheter tips can affect antibiotic clearance during continuous renal replacement therapy

Intensive Care Medicine Experimental
Background The aim of this experimental study was to elucidate whether different distances between central venous catheter tips can affect drug clearance during continuous renal replacement therapy (CRRT).
Anna Bandert, Miklós Lipcsey, Robert Frithiof, Anders Larsson, David Smekal   +4 more
doaj   +1 more source

Determining the influence of roughness and tip clearance on the axial multistage compressor characteristics

Авіаційно-космічна техніка та технологія
The operation of gas turbine engines inevitably increases the blade roughness and tip clearance in multistage axial compressors. The result is an increase in its thermogasodynamic parameters. The reason for the increase in the roughness of the blades and
Vadym Datsenko
doaj   +1 more source