Optimization and Flow Field Analysis of a Two-stage Turbocharging System for Drilling Rig Diesel Engines

doi:10.11885/j.issn.1674-5086.2018.03.15.02

Abstract

Abstract: Based on the actual dimensions and experimental data of Jichai 190 series diesel engines, the modification of these engines using a two-stage turbocharger was analyzed, and a scheme for installing a two-stage turbocharger in these engines was established. An engine model was constructed using the GT-Power engine simulation software, which was also used to validate the reliability of the model. A two-stage turbocharger was then simulated in GT-Power, and a comparison was performed between the two-stage turbocharger and the original turbocharger of Jichai 190 series diesel engines. A channel model was constructed with appropriate boundary conditions to analyze the internal flow fields of the two-stage turbocharging system. An analysis was then conducted on the internal flow field distribution and operating conditions of the compressor end and turbine end of the original turbocharger and two-stage turbocharging system. It was observed that the new turbocharging system results in improved acceleration performance, dynamic performance, and low rounds-per-minute (RPM) performance compared to the original engine. In addition, the increase in air intake in the new turbocharging system helps to burn fuel more thoroughly and cleanly, which greatly reduces the engine's fuel consumption rates and the NO_x content of its exhaust gases.

Key words: two-stage turbocharger, drilling rig, flow field analysis, engine performance, reducing energy consumption and emissions

CLC Number:

TE933

ZHONG Gongxiang, XIANG Ling, MU Bofeng. Optimization and Flow Field Analysis of a Two-stage Turbocharging System for Drilling Rig Diesel Engines[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 172-180.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2018.03.15.02

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2018/V40/I6/172

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