Presentation Information
[2P33][Withdraw] Differential transport behavior of gases in a single-stage turbine blade row and its impact on the pumping characteristics of adjacent blade rows
*xiaodong wang1 (1. School of Mechanical Engineering and Automation, Northeastern University, China)
In this study, the Test Particle Monte Carlo (TPMC) simulation method was used to investigate the transport behavior of gases such as hydrogen, helium, nitrogen, and argon in turbine blade rows under different temperature conditions. The results show that a large proportion of gas molecules pass directly through the blade row without colliding with it and then impinge on the next-stage turbine blade row, which has a negative impact on the pumping characteristics of adjacent turbine blade rows. Lightweight gases (e.g., hydrogen) exhibit a lower forward direct-transmission ratio than heavyweight gases (e.g., argon), while their reverse direct-transmission ratio is higher than that of heavyweight gases, demonstrating significant differential transport characteristics. As the operating temperature increases, the forward transmission performance of gas molecules decreases, and their reverse transmission capacity improves, which has a negative impact on the performance of the molecular pump.