A fluid-solid coupling simulation method for convection heat transfer coefficient considering the under-vehicle condition

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Tian, C.^1 ; Weng, J.^1 ; Liu, Y.^1

Institute of Railway and Urban Rail Transit, Tongji University, Shanghai

201804, China^1

关键词: Calculation models;    Calculation results;    Empirical formulas;    Evaluation index;    Fluid-solid coupling;    Negative pressures;    Positive pressure;    Vehicle condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012094/pdf
DOI  :  10.1088/1755-1315/94/1/012094

来源: IOP

【 摘 要 】

The convection heat transfer coefficient is one of the evaluation indexes of the brake disc performance. The method used in this paper to calculate the convection heat transfer coefficient is a fluid-solid coupling simulation method, because the calculation results through the empirical formula method have great differences. The model, including a brake disc, a car body, a bogie and flow field, was built, meshed and simulated in the software FLUENT. The calculation models were K-epsilon Standard model and Energy model. The working condition of the brake disc was considered. The coefficient of various parts can be obtained through the method in this paper. The simulation result shows that, under 160 km/h speed, the radiating ribs have the maximum convection heat transfer coefficient and the value is 129.6W/(m2•K), the average coefficient of the whole disc is 100.4W/(m2•K), the windward of ribs is positive-pressure area and the leeward of ribs is negative-pressure area, the maximum pressure is 2663.53Pa.