高速列車牽引變流器冷卻系統散熱特性研究

摘要：在分析CRH3 型高速列車牽引變流器冷卻系統結構與工作原理的基礎上，根據冷卻系統熱交換器實物尺寸、冷卻液實際流速等參數，應用ANSYS 有限元分析軟件建立了牽引變流器冷卻系統熱交換器模型，并設置相應仿真邊界條件，由ANSYS/FLOTRAN 解析出熱交換器的流場和溫度場分布情況。通過對分析結果的后處理，計算得出了冷卻系統熱交換器的散熱功率，其結果與牽引變流器功率損耗參數基本相符，驗證了仿真分析的正確性。仿真分析結果有助于對高速列車牽引變流器冷卻系統散熱能力的評估，及冷卻系統熱交換器結構設計的改進，為進一步提高高速列車牽引變流器冷卻系統的散熱能力提供了理論依據。 敘詞：高速列車，牽引變流器冷卻系統，熱交換器，ANSYS/FLOTRAN，溫度場 Abstract：Following the analysis of the cooling system structure and relevant principles of the CRH3 high-speed train traction converter
and based on parameters of sizes of cooling system thermal exchanger and the real velocity of cooling fluid, thermal exchanging model
of traction converter cooling system is constructed, simulated marginal conditions are set by applying ANSYS finite element analysis
software, and fluid field of thermal exchanger and temperature field distributions are analyzed by ANSYS/FLOTRAN. Based on the
post-calculation of analysis results, heat dissipation power of the cooling system thermal exchange is reached, which is about to match
the power loss parameters of traction converter, hence the correctness of simulation analysis is verified. Simulation analysis helps the
evaluation of cooling system heat dissipation capacity of high-speed train traction converter, and is helpful to the improvement of the
structure design of cooling system thermal exchanger. It also provides theoretical foundation for improving the heat dissipation ability of
the cooling system for high-speed train traction converter. Keyword：High-speed train, Traction converter cooling system, Thermal fxchanger, ANSYS/FLOTRAN, Temperature field