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Experiment and surge analysis of centrifugal
two-stage turbocharging system |
| HE Yituan1, MA Chaochen2 |
| 1.School of Mechatronics & Automotive Engineering, Chongqing Jiaotong University; 2.School of Mechanical and Vehicular Engineering, Beijing Institute of Technology; |
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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.
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Issue Date: 05 December 2008
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