Influence of Inlet Boundary Condition on Internal Swirl Distortion of&nbsp; Two-Stage Turbocharger Interstage Pipeline

CHENG Jianghua; LUO Yiwei; ZHANG Wei; QIAN Yuping; WANG Xianlei; WANG Zexing

doi:10.3969/j.issn.1001-2222.2022.03.007

Vehicle Engine ›› 2022, Vol. 0 ›› Issue (3) : 44-50. DOI: 10.3969/j.issn.1001-2222.2022.03.007

Influence of Inlet Boundary Condition on Internal Swirl Distortion of Two-Stage Turbocharger Interstage Pipeline

CHENG Jianghua,¹LUO Yiwei²,ZHANG Wei³，QIAN Yuping²,WANG Xianlei¹,WANG Zexing⁴

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Abstract

The complicated interstage connection pipeline between the high and low pressure compressor in the two-stage turbocharging system of diesel engine leads to the swirl distortion at the inlet of high-pressure compressor, which affects the system matching. The distorted flow characteristics were studied to provide a design reference for the interstage pipeline design. The effects of uniform normal intake and low-pressure compressor volute outlet flow field on the flow field of interstage pipeline were comparatively studied by using the 3D numerical simulation method. It was found that the swirl intensity of interstage pipeline outlet for the low-pressure compressor volute outlet flow field was significantly higher than that of uniform normal intake, the total pressure loss between them differed by 16%, and the downstream high-pressure compressor efficiency between them differed by 2% in absolute value. Pipeline bending was the main reason that affected the swirl intensity. Accordingly, the outlet flow characteristic of low-pressure compressor volute and the bending position and turning radius of interstage pipeline should be comprehensively considered in engineering design.

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diesel engine / two-stage turbocharging / interstage pipeline / flow distribution / swirl distortion

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CHENG Jianghua,LUO Yiwei,ZHANG Wei，QIAN Yuping,WANG Xianlei,WANG Zexing. Influence of Inlet Boundary Condition on Internal Swirl Distortion of Two-Stage Turbocharger Interstage Pipeline[J]. Vehicle Engine. 2022, 0(3): 44-50 https://doi.org/10.3969/j.issn.1001-2222.2022.03.007