过程装备与控制工程毕业设计外文翻译(英文).docxVIP

外文翻译 翻译1: Proceedings of the ASME 2013 International Mechanical Engineering Congress and Exposition November 15-21, 2013, San Diego, California, USA IMECE2013-63449 INFLUENCE OF SKEWING OF CONTACT FACE ON PERFORMANCE OF WAVE ROTOR REFRIGERATORS AND SUPERCHARGERS 接触面的倾斜对波转子制冷机和机械增压器性能的影响 Dai Yuqiang School of Chemical Machinery, Dalian University of Technology Dalian, Liaoning, China Liu Fengxia School of Chemical Machinery, Dalian University of Technology Dalian, Liaoning, China Wu Jintao School of Chemical Machinery, Dalian University of Technology Dalian, Liaoning, China Wei Wei School of Chemical Machinery, Dalian University of Technology Dalian, Liaoning, China Hu Dapeng* School of Chemical Machinery, Dalian University of Technology Dalian, Liaoning, China LIU Xuewu School of Chemical Machinery, Dalian University of Technology Dalian, Liaoning, China ABSTRACT As a novel generation of rotational gas wave machines, wave rotor machines such as wave rotor refrigerators (WRR) and wave rotor superchargers (WRS) are unsteady flow devices. In their passages two gas streams (with different pressure or even different phases) comes into direct contact can exchange energy due to the movement of shock waves and expansion waves. A detailed study shows that, when rotor channels open to the high pressure port gradually, the contact face in rotor channels inevitably skews, which is always accompanied with reflection of shockwaves. This causes very large energy dissipation and influences adversely on the refrigeration performance of WRR or the supercharging performance of WRS. In this work, factors such as centrifugal forces, Coriolis forces, gradual channel opening and gradual channel closing, etc, which influence the wave transportation and skewing of shock waves and contact faces are studied by means of computational fluid dynamics and experiments. The skewing of contact faces causes uneven distribution of velocity and large local loss. With rotation Mach number smaller than