Results 71 to 80 of about 26,676 (308)

Wavelet Analysis of a Blade Tip-Leakage Flow [PDF]

, 2018
The secondary flow generated by the clearance between an isolated airfoil tip and an end-plate is analyzed by means of a zonal large-eddy simulation, in comparison with available experimental data. The flow around the tip clearance is described with full
Boudet, Jérôme, Caro, Joëlle, Jacob, Marc C., Jondeau, Emmanuel, Li, Bo   +4 more
core   +3 more sources

Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review

Advanced Robotics Research, EarlyView.
Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang, J. An, X. Zheng, D. Wang, S. Wang, X. Wang, P. Zhu, J. Pei, S. Li, J. Paripurana, Y. Han, Z. Tang, X. Gan, Q. He, X. Ma   +14 more
wiley   +1 more source

Tip gap size effects on thermal performance of cavity-winglet tips in transonic turbine cascade with endwall motion

Journal of the Global Power and Propulsion Society, 2017
The thermal performance of two cavity-winglet tips with endwall motion is investigated in a transonic high pressure turbine cascade, which operates at an engine representative exit Mach number of 1.2 and an exit Reynolds number of 1.7 × 106.
Fangpan Zhong, Chao Zhou
doaj   +1 more source

Effect of rotor tip clearance and configuration on overall performance of a 12.77-centimeter tip diameter axial-flow turbine [PDF]

The rotor tip clearance was obtained by use of a recess in the casing above the rotor blades and also by use of a reduced blade height. For the recessed casing configuration, the optimum rotor blade height was found to be the one where the rotor tip ...
Haas, J. E., Kofskey, M. G.
core   +1 more source

An assessment of body force representations for compressor stall simulation [PDF]

, 2010
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2010.Cataloged from PDF version of thesis.Includes bibliographical references (p.
Kerner, Jonathan (Jonathan H.)
core  

Tumbling Magnetic Microrobots for Targeted In Vivo Drug Delivery in the GI Tract

Advanced Robotics Research, EarlyView.
We introduce a microrobot design and integrated system for on‐demand targeted drug release in the gastrointestinal tract. The microrobot has an embedded magnet for actuation with external magnetic fields and is visualized in real time using ultrasound. It has two drug release ports sealed with a thermally sensitive wax. Local heating of the wax using a
Aaron C. Davis, Luis Carlos Sanjuan Acosta, Shubh P. Mehta, Baiyan Qi, Yang Yang, Luis Solorio, Craig J. Goergen, David J. Cappelleri   +7 more
wiley   +1 more source

Investigation of hydraulic transient flow and dynamic response performance of axial pump based on novel vibration signals characteristics and numerical analyses

Alexandria Engineering Journal
Simulation studies were conducted to investigate structure of internal flow and pulsation in pressure properties of pumps under different flow circumstances.
Ahmed Ramadhan Al-Obaidi, Anas Alwatban
doaj   +1 more source

Analysis of impeller blade parameters and tip clearance of turboexpander in organic Rankine cycle system

Energy Science & Engineering, 2019
The optimization of a turboexpander can significantly improve the performance of the organic Rankine cycle (ORC) system, which can use in low‐temperature geothermal energy for high‐efficiency power generation.
Wenguang Jia, Chuanwei Wang, Kerui Zhang, Shaohua Feng, Jinglu Yan, Bingcheng Liu   +5 more
doaj   +1 more source

Aerodynamic performance optimization and unsteady flow field stability analysis of a supercritical carbon dioxide centrifugal compressor with non-uniform blade tip clearance [PDF]

AIP Advances
Tip leakage flow is a critical factor constraining the efficiency and stability of supercritical carbon dioxide (SCO2) centrifugal compressors. To address this challenge, this study proposes a non-uniform blade tip clearance design and establishes a ...
Zhengjing Shen, Liuhao Liu, Jiangbo Wu, Senchun Miao, Xiaoze Du   +4 more
doaj   +1 more source

A review of blade tip clearance–measuring technologies for gas turbine engines

Measurement + Control, 2020
Blade tip clearance is one of the important parameters affecting the performance, safety and stability of a gas turbine engine. However, it is difficult to measure the tip clearance in real time and accurately during the development and test process of ...
Bing Yu, Hongwei Ke, Enyu Shen, Tianhong Zhang   +3 more
doaj   +1 more source