Results 71 to 80 of about 374 (172)

Energy transfer process and evolution characteristics in impeller of contra-rotating axial fan

Meitan kexue jishu
Energy is transferred to the airflow during the rotation of impeller. In engineering, the efficient energy conversion is a key issue. Mastering the energy transfer process in impeller is the premise and basis for realizing efficient energy conversion. In
Yongping CHEN, Ronghua LIU, Shiqiang CHEN, Dong LIU, Yangyi LI, Xiao WANG   +5 more
doaj   +1 more source

FREQUENCIES AND MODES OF ROTATING FLEXIBLE SHROUDED BLADED DISCS-SHAFT ASSEMBLIES

TASK Quarterly, 2003
It is now increasingly necessary to predict accurately, at the design stage and without excessive computing costs, the dynamic behaviour of rotating parts of turbomachines, so that resonant conditions at operating speeds are avoided. In this study, global  rotating mode shapes of flexible shrouded bladed disc-shaft assemblies are calculated.
JACEK SOKOŁOWSKI, ROMUALD RZĄDKOWSKI, LESZEK KWAPISZ   +2 more
openaire   +1 more source

Numerical Study On Parametrical Design Of Long Shrouded Contra-Rotating Propulsion System In Hovering

, 2011
The parametrical study of Shrouded Contra-rotating Rotor was done in this paper based on 2D axisymmetric simulations. The calculations were made with an actuator disk as double rotor model. It objects to explore and quantify the effects of different shroud geometry parameters mainly using the performance of power loading (PL), which could evaluate the ...
Huo, Chao, Barènes, Roger, Gressier, Jérémie, Grondin, Gilles   +3 more
openaire   +2 more sources

Influence of delayed excitation on vibrations of turbine blades couple

Applied and Computational Mechanics, 2013
In the presented paper, the computational model of the turbine blade couple is investigated with the main attention to the influence two harmonic excitation forces, having the same frequency and amplitude but with moderate delay in time.
Půst L., Pešek L.
doaj  

Investigation on predicting the stall limit of compressor at low rotating speed

Advances in Mechanical Engineering
In order to realize fast and accurate prediction of the stall limit of compressor, a study on predicting the stall limit of compressor at low rotating speed is conducted with throughflow calculation and maximum static pressure rise coefficient.
Hong Wu, Xiaoyong Zhou, Guoyu Zhou, Xiaobin Que, Liu He   +4 more
doaj   +1 more source

Study of Energy Loss Characteristics of a Shaft Tubular Pump Device Based on the Entropy Production Method. [PDF]

Entropy (Basel), 2023
Ji D, Lu W, Xu B, Xu L, Lu L.
europepmc   +1 more source

Flow and Heat Transfer in Rotating Compressor Cavities With Inverted Shroud-Throughflow Temperature Differences

Journal of Turbomachinery
Abstract In an aero-engine compressor, co-rotating discs form cavities that interact with an axial throughflow of secondary air at low radius. In the high-pressure (HP) compressor the shroud is hotter than the throughflow (directed downstream to the turbine) and the radial temperature gradient creates buoyancy-induced flow at Grashof ...
Pernak, Mikolaj J., Nicholas, Thomas E. W., Carnevale, Mauro, Lock, Gary D., Tang, Hui, Scobie, James a.   +5 more
openaire   +2 more sources

Influence of inflow directions and setting angle of inlet guide vane on hydraulic performance of an axial-flow pump. [PDF]

Sci Rep, 2023
Nguyen DA, Ma SB, Kim S, Kim JH.
europepmc   +1 more source

Simulation Study on the Influence of Different Molten Steel Temperatures on Inclusion Distribution under Dual-Channel Induction-Heating Conditions. [PDF]

Materials (Basel), 2023
Yi B, Zhang G, Jiang Q, Yan P, Feng Z, Tian N.   +5 more
europepmc   +1 more source

Effect of the Radial Velocity Distribution on the Loss Generation of a Contra-Rotating Fan in a Ventilation System. [PDF]

Entropy (Basel), 2023
Jia X, Zhang X, Guo K, Li X.
europepmc   +1 more source