Experiment and surge analysis of centrifugal two-stage turbocharging system

Abstract

To study a centrifugal two-stage turbocharging system’s surge and influencing factors, a special test bench was set up and the system surge test was performed. The test results indicate that the measured parameters such as air mass flow and rotation speed of a high pressure (HP) stage compressor can be converted into corrected parameters under a standard condition according to the Mach number similarity criterion, because the air flow in a HP stage compressor has entered the Reynolds number (Re) auto-modeling range. Accordingly, the reasons leading to a two-stage turbocharging system’s surge can be analyzed according to the corrected mass flow characteristic maps and actual operating conditions of HP and low pressure (LP) stage compressors.

References

1. Zhu Daxin . Turbo Boosting and Turbocharger. Beijing: China Machine Press, 1992 (in Chinese)
2. He Yituan, Ma Chaochen, Wei Mingshan, Zhu Zhifu . Experimentalstudy on the compressor performance of two stage turbocharing system. Transactions of Beijing Institute of Technology, 2007, (6): 496–500 (in Chinese)
3. Zhu Meilin . Principle of Turbocharger. Beijing: National Defence Industry Press, 1982 (in Chinese)
4. Wang Yansheng, Huang Yousheng . Vehicular Engine ExhaustGas Turbocharging. Beijing: National Defence Industry Press, 1984 (in Chinese)
5. Zhang Yeying . Fluid Mechanics (2nd ed). Beijing: Higher Education Press, 1999 (in Chinese)