MEAN-LINE MODELLING OF A VARIABLE GEOMETRY TURBOCHARGER (VGT) AND PREDICTION OF THE ENGINE-TURBOCHARGER COUPLED PERFORMANCE

被引：0

作者：

Thomas, Anand Mammen ^{[1
]}

Samuel, Jensen ^{[2
]}

Ramesh, A. ^{[2
]}

机构：

[1] RIC, DRDO, Madras, Tamil Nadu, India

[2] Indian Inst Technol Madras, Madras, Tamil Nadu, India

来源：

PROCEEDINGS OF THE ASME GAS TURBINE INDIA CONFERENCE, 2017, VOL 1 | 2018年

关键词：

RADIAL INFLOW TURBINE; DESIGN;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Mean-line modelling approach which has generally been applied to fixed geometry turbocharger turbines has been extended to predict the performance of the variable geometry turbine for different inlet blade angles. The model uses an initial assumption of turbine inlet pressure which was iteratively corrected based on outlet pressure boundary condition. The model was implemented in MATLAB and stable and convergent solutions were obtained using relaxation techniques for different operating conditions. Experiments were done on a state of the art transient diesel engine test bed using the same VGT turbine in the turbocharger at different engine torques and speeds. Using experimental data the model was calibrated for the aerodynamic blockage in the fixed nozzle and rotor blade passages. Results revealed that turbine overall pressure ratio can be predicted accurately if a blockage factor varying with nozzle blade orientation is used in the model.

引用

页数：11