Fluid–structure interaction analysis of a high-pressure regulating valve of a 600-MW ultra-supercritical steam turbine

2015 ◽  
Vol 229 (3) ◽  
pp. 270-279 ◽  
Author(s):  
Xiaojing Sun ◽  
Xiaowei Li ◽  
Zhongquan Zheng ◽  
Diangui Huang
Keyword(s):  
High Pressure ◽  
Steam Turbine ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction

Fluid-Structure Interaction Analysis on the Performance of the High-Pressure Fuel Pump for Diesel Engines

2016 ◽  
Author(s):  
Dexing Qian ◽  
Ridong Liao ◽  
Jianhua Xiang ◽  
Baigang Sun ◽  
Shangyong Wang
Keyword(s):  
High Pressure ◽  
Diesel Engines ◽  
Interaction Analysis ◽  
Physical Phenomenon ◽  
Fluid Structure Interaction ◽  
Dead Volume ◽  
Fuel Pump ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Spring Force

In this paper, a 3-D fluid-structure interaction (FSI) analysis on the performance of the high-pressure fuel pump for diesel engines is presented. The fluid and structure are two-way coupled and several complex factors are taken into accounts in the FSI model. For instance, the fluid model includes not only the high-pressure fuel pump but also the rail and pressure-control valve which are used to maintain a stable delivery pressure of the pump; Gap boundary condition is adopted to simulate the opening and closing of the valve; The flow is assumed to be nonisothermal and the physical properties of the fuel such as dynamic viscosity and density are functions of pressure and temperature. While in the structure model, the spring force on the valve and the contacts between the valve and the valve seat as well as the top block are considered. The calculated volumetric efficiency losses agree well with the experiments, which indicates that the FSI model established in this study could well predict the physical phenomenon taking place in the high-pressure fuel pump. Several new conclusions can be drawn from the discussions on the results such as the suction efficiency loss due to the delay closing of the inlet valve is extremely small while the suction loss due to the expansion of the high-pressure fuel entrapped in the dead volume is very large.

A Nonisothermal Fluid-Structure Interaction Analysis on the Piston/Cylinder Interface Leakage of High-Pressure Fuel Pump

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Dexing Qian ◽  
Ridong Liao
Keyword(s):  
High Pressure ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Fluid Pressure ◽  
Leakage Rate ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Piston Cylinder ◽  
Piston Pair ◽  
Nonisothermal Fluid

In this paper, a nonisothermal fluid-structure interaction mathematical model for the piston/cylinder interface leakage is presented. Full account is taken of the piston eccentricity, elastic deformations of the piston pair, the nonisothermal flow in the interface, and the physical properties of the fluid such as the pressure-viscosity and temperature-viscosity effects. The numerical method for the solution of the model is given, which can simultaneously solve for the fluid pressure distribution and leakage rate in the interface. The model is validated by comparing the calculated leakage rates with the measurements. Results show the good accuracy of the model. The impacts of parameters such as the piston diameter, the initial clearance between the piston pair, and the piston velocity on the leakage rate are discussed. Some of the conclusions provide good guidance for the design of high-pressure fuel pumps.

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