Experimental and Numerical Study on the Fuel Pressure Fluctuations Aroused by the Injector for the Electronic Unit Pump System

2017 ◽  
Author(s):  
Fushui Liu ◽  
Ning Kang ◽  
Yikai Li ◽  
Pei Wang
Keyword(s):  
Numerical Study ◽  
Pressure Fluctuations ◽  
Electronic Unit ◽  
Pump System ◽  
Electronic Unit Pump

Model Simulation of Electronic Unit Pump Diesel Engine Oriented to Control

2012 ◽  
Vol 443-444 ◽  
pp. 495-500
Author(s):  
Jun Wang ◽  
Shu Han ◽  
You Tong Zhang
Keyword(s):  
Diesel Engine ◽  
Model Simulation ◽  
Model Verification ◽  
Electronic Unit ◽  
Simulation Test ◽  
Pump System ◽  
Calculation Step ◽  
Electronic Unit Pump ◽  
Hardware In Loop ◽  
Hardware In Loop Simulation

To broaden the application range of hardware in loop simulation for electronic controlled unit, study on model simulation of electronic unit pump diesel engine oriented to control is made, the requirement and selection of simulation model oriented to control in electronic unit pump diesel engine is provided, model of simplified nonlinearity in diesel engine and electronic unit pump system are established in Matlab/Simulink, model verification shows that this model can achieve relative accuracy, by means of calculation time and parameter, different calculation step and method affecting model output is analyzed and compared. Real engine model is applied into hardware-in-loop simulation test, its results show that model can perform real-time ECU hardware-in-loop simulation test accurately.

scholarly journals Numerical study of the vortex breakdown and vortex reconnection in the flow path of high-pressure water turbine

2021 ◽  
Vol 2088 (1) ◽  
pp. 012040
Author(s):  
A V Sentyabov ◽  
D V Platonov ◽  
A V Minakov ◽  
A S Lobasov
Keyword(s):  
Vortex Core ◽  
Vortex Breakdown ◽  
Numerical Study ◽  
Pressure Fluctuations ◽  
Hydraulic Turbine ◽  
Sliding Mesh ◽  
Precessing Vortex Core ◽  
Vortex Reconnection ◽  
Water Turbine ◽  
Pressure Water

Abstract The paper presents a study of the instability of the precessing vortex core in the model of the draft tube of a hydraulic turbine. The study was carried out using numerical modeling using various approaches: URANS, RSM, LES. The best agreement with the experimental data was shown by the RSM and LES methods with the modelling of the runner rotation by the sliding mesh method. In the regime under consideration, the precessing vortex rope is subject to instability, which leads to reconnection of its turns and the formation of an isolated vortex ring. Reconnection of the vortex core leads to aperiodic and intense pressure fluctuations recorded on the diffuser wall.

Numerical study on supersonic internal cavity flows - What causes the pressure fluctuations?

1999 ◽  
Author(s):  
Yoko Takakura ◽  
Takayoshi Suzuki ◽  
Fumio Higashino ◽  
Masahiro Yoshida
Keyword(s):  
Numerical Study ◽  
Pressure Fluctuations ◽  
Internal Cavity ◽  
Cavity Flows
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