下翅 meaning in Chinese

underwing

Secondly , the temperature distribution in rib - tube heat exchanger in the course of heat transfer is programed and simulated using apdl language of fem software ansys , and the average convection coefficient of both sides is obtained . the rib - tubes with different structure are also simulated and optimized on the base of the calculated results , the relationship between structure and the average convection coefficient of both sides is summrized . the rib - tube structure is optimized using apdl . finally , combines numerical simulation with experimental research , and results of numerical simulation are found to be close to the experimental data
利用ansys有限元程序对翅片管换热器的换热过程进行数值模拟，确定了换热过程中翅片管的温度场和热流量梯度分布状况，对翅片管换热器的多组分流场进行计算，给出了逆流和顺流两种情形下翅片管结构参数对换热效果的影响规律，并利用ansys提供的优化技术编写程序对翅片管进行结构优化设计，为其今后在工业中的设计及使用提供了重要依据。