Performance Simulation and Design Calculation of the System of Centrifugal Compressor-Driven Centripetal Turbine

2019 ◽  
Vol 08 (02) ◽  
pp. 63-70
Author(s):  
宇飞 焦
Keyword(s):  
Centrifugal Compressor ◽  
Design Calculation ◽  
Performance Simulation ◽  
Centripetal Turbine

Turbocharger Performance Simulation with Optimized 1D Model

2012 ◽  
Vol 516-517 ◽  
pp. 692-708
Author(s):  
Xiao Yang Gong ◽  
Rui Chen
Keyword(s):  
Centrifugal Compressor ◽  
Critical Role ◽  
Engine Performance ◽  
Stable Operation ◽  
Performance Simulation ◽  
Automotive Engine ◽  
Compression Ignition Engines ◽  
Performance Curves ◽  
Surge Line ◽  
And Performance

Turbocharging technique has played a critical role not only for improving automotive engine performance, but also for reducing fuel consumption and exhaust emissions both in Spark Ignition and Compression Ignition engines. In the research described in this paper, a 1D centrifugal compressor model has been developed for simulating turbocharger flow and performance. The model takes into account energy conservation and transfer which includes the losses determined from the compressor geometry. The losses including incident loss, friction loss, clearance loss, backward loss and volute loss were simulated by the thermodynamics model, rather than from the characteristic performance curves obtained experimentally. The proposed model was validated against experimental data and it showed simulating and experimental results are in very good agreement at three different rotational speeds, in particular near the surge line, though the deviation begins to increase as mass flow rate goes up. With current results, it has suggested the proposal is suitable for predicting the compressor performance curves such as outlet pressure, efficiency and losses for any centrifugal compressor. In addition, surge line obtained from the simulation result can be used to define stable operation range.

On the Evaluation of Reynolds Number and Relative Surface Roughness Effects on Centrifugal Compressor Performance Based on Systematic Experimental Investigations

1984 ◽  
Vol 106 (2) ◽  
pp. 489-498 ◽  
Author(s):  
H. Simon ◽  
A. Bu¨lska¨mper
Keyword(s):  
Surface Roughness ◽  
Reynolds Number ◽  
Centrifugal Compressor ◽  
Performance Test ◽  
Flow Coefficient ◽  
Experimental Investigations ◽  
Design Calculation ◽  
Roughness Effects ◽  
Number Range ◽  
Compressor Performance

This paper summarizes the results of systematic investigations into the Reynolds number effects. It is based on performance map measurements carried out on a compressor test rig which was constructed primarily for this purpose. The measurements were performed for stages with different flow coefficients (0.004 ≦ φ1 ≦ 0.05), with different gases (air, nitrogen, helium, freon) and in the inlet pressure range 0.2 bar ≦ p1 ≦ 40 bar. By analogy with the turbulent flow in technically rough pipes, semi-empirical correlations are derived concerning the effects of the Reynolds number and the relative surface roughness on the characteristic performance parameters (efficiency, flow coefficient, head coefficient, work coefficient). For the detailed design calculation of individual stages, provision is made for the different effects on the hydraulic flow losses and the disk friction losses. Simplified correlations are given for the conversion of characteristics measured during thermodynamic performance tests. The correlations are applied to various single and multistage compressors, and the results compared with measured performance characteristics in the Reynolds number range 6 × 103 ≦ Ret ≦ 1.1 × 107. The good correspondence obtained forms the basis for recommending the application of these simplified relationships for the improvement of centrifugal compressor performance test codes (e.g. ASME PTC-10 and ISO TC 118).

Reducing Gas Flaring by Improving Turndown Ratio of Centrifugal Compressor

2011 ◽  
Author(s):  
Falah Mutiaz Al-Azmi ◽  
Chirag Ashwinkumar Parikh
Keyword(s):  
Centrifugal Compressor ◽  
Gas Flaring ◽  
Reducing Gas
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