Investigating a New Method-Based Internal Joint Operation Law for Optimizing the Performance of a Turbocharger Compressor
Abstract
:1. Introduction
2. Materials and Methods
2.1. Research Objects
2.2. Setting Model Parameters
2.3. Test Preparation and Model Validation
3. Internal Joint Operation Law Analysis
3.1. Coupling of Internal Joint Operation Curves
3.2. Propose the Total Efficiency Calculation Method of the Compressor
3.3. Internal Joint Point Operation Law (IJOL) Method
4. Results and Discussion
4.1. Analysis of Compressor Blade Number Based on IJOL Method
4.1.1. Optimization of the Blade Number
4.1.2. Blade Tip Profile Optimization
4.2. Comparison and Validation Analysis of the IJOL and Traditional Methods
4.3. Comparative Analysis of Engine Performance with Optimized Structures of Two Methods
- The working fluid was a uniform state, and the air entering the cylinder and the residual exhaust gas were completely mixed instantaneously;
- Air and mixed gas were considered ideal gases, and their thermodynamic parameters were affected by the temperature and composition of the gas;
- A steady flow process was regarded for the process of working fluid;
- The import and export kinetic energy of the working fluid was negligible, and there was no leakage during the combustion process;
- The combustion heat release process was regarded as a thermodynamic process in which the external heats the working fluid inside the system in accordance with the established heat release law.
4.4. Experimental Verification and Comparison of Compressor Optimization
5. Conclusions
- Based on the joint operating characteristics of the two ends of the turbocharger compressor and turbine, the IJOL method of the turbocharger was coupled using the performance distribution of the compressor and turbine, and the calculation method for the total efficiency of the turbocharger was improved. The efficiency of the compressor obtained using the IJOL method was synchronized with the working of the two ends, which was closer to the actual situation, and more practical.
- Based on the IJOL method, the effects of the blade number and the blade tip profile on the performance were analyzed. For the blade number, the 8-blade compressor had the best overall performance. For the blade tip profile, the compressor with the impeller inlet diameter reduced by 3.12% as compared with the original compressor had better surge performance.
- Compared with the traditional method, the maximum efficiency of the IJOL method was slightly lower, but its joint point performance was higher than that of the traditional method.
- Compared with the performance of the original engine, the power and fuel economy of the engine designed based on the traditional method were worse than those of the original engine. The maximum torque of the engine based on the IJOL method was 4.2% higher than that of the original engine, and the minimum BSFC was 3.1% lower. Compared with the traditional method, the IJOL had obvious advantages.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Item | Value | Item | Value |
---|---|---|---|
Outlet diameter D1t of compressor impeller (mm) | 44 | Inlet diameter of turbine impeller (mm) | 37.6 |
Inlet diameter of compressor impeller (mm) | 32.1 | Outlet diameter of turbine impeller (mm) | 33.1 |
Blade number of compressor | 8 | Blade number of turbine | 11 |
Diffuser height (mm) | 2.5 | Turbine impeller inlet blade angle (°) | 0 |
Design pressure ratio | 2.2 | Turbine impeller inlet blade height (mm) | 5.1 |
Rated speed (r/min) | 220,000 | Turbine impeller axial length (mm) | 18.9 |
Flow range (kg/s) | 0.02–0.13 | Turbine impeller exit mean blade angle (°) | 56.4 |
Displacement of gasoline engine (L) | 1.5 | Type of cooling | oil cooling + water cooling |
Surge Margin | Joint Point Efficiency | Pressure Rate | Choke Flow Rate | Maximum Efficiency | |
---|---|---|---|---|---|
Weight distribution | 30 | 25 | 25 | 10 | 10 |
7 | 8 | 9 | 10 | |||||
---|---|---|---|---|---|---|---|---|
Speed (r/min) | Surge Flow Rate (kg/s) | Surge Margin (%) | Surge Flow Rate (kg/s) | Surge Margin (%) | Surge Flow Rate (kg/s) | Surge Margin (%) | Surge Flow Rate (kg/s) | Surge Margin (%) |
110,000 | 0.0193 | 10 | 0.0198 | 9.5 | 0.0201 | 9.2 | 0.0204 | 8.9 |
150,000 | 0.0373 | 8 | 0.0377 | 7.6 | 0.0380 | 7.3 | 0.0381 | 7.2 |
190,000 | 0.0508 | 12.4 | 0.0508 | 12.4 | 0.0509 | 12.3 | 0.0506 | 12.6 |
7 | 8 | 9 | 10 | |
---|---|---|---|---|
Mean surge margin (%) | 10.13 | 9.83 | 9.60 | 9.57 |
Mean joint point efficiency (%) | 64.5 | 65.1 | 65.8 | 65.9 |
Mean joint point pressure ratio | 1.871 | 1.953 | 1.967 | 1.978 |
Maximum efficiency (%) | 72.296 | 73.029 | 73.675 | 74.07 |
Choke flow rate (kg/s) | 0.1385 | 0.137 | 0.136 | 0.134 |
Performance index | 99.6 | 100.0 | 99.8 | 99.8 |
Original | Scheme A | Scheme B | Scheme C | |||||
---|---|---|---|---|---|---|---|---|
Speed (r/min) | Surge Flow Rate (kg/s) | Surge Margin (%) | Surge Flow Rate (kg/s) | Surge Margin (%) | Surge Flow Rate (kg/s) | Surge Margin (%) | Surge Flow Rate (kg/s) | Surge Margin (%) |
110,000 | 0.0198 | 9.5 | 0.0180 | 11.3 | 0.0180 | 11.3 | 0.0158 | 13.5 |
150,000 | 0.0377 | 7.6 | 0.0345 | 10.8 | 0.0370 | 8.3 | 0.0335 | 11.8 |
190,000 | 0.0508 | 12.4 | 0.0465 | 16.7 | 0.0500 | 13.2 | 0.0454 | 17.8 |
Original | Scheme A | Scheme B | Scheme C | |
---|---|---|---|---|
Mean surge margin (%) | 9.83 | 12.93 | 10.93 | 14.37 |
Mean joint point efficiency (%) | 65.1 | 66.5 | 66.1 | 66.5 |
Mean joint point pressure ratio | 1.953 | 1.943 | 1.954 | 1.936 |
Maximum efficiency (%) | 73.029 | 73.845 | 71.225 | 71.965 |
Choke flow rate (kg/s) | 0.137 | 0.130 | 0.131 | 0.127 |
Performance index | 100.0 | 109.5 | 103.0 | 113.3 |
Original | Traditional Method | IJOL Method | ||||
---|---|---|---|---|---|---|
Speed (r/min) | Surge Flow Rate (kg/s) | Surge Margin (%) | Surge Flow Rate (kg/s) | Surge Margin (%) | Surge Flow Rate (kg/s) | Surge Margin (%) |
110,000 | 0.0198 | 9.5 | 0.0180 | 11.3 | 0.0196 | 9.7 |
150,000 | 0.0377 | 7.6 | 0.0345 | 10.8 | 0.0371 | 8.4 |
190,000 | 0.0508 | 12.4 | 0.0465 | 16.7 | 0.0502 | 13.0 |
Original | Traditional Method | IJOL Method | |
---|---|---|---|
Mean surge margin (%) | 9.83 | 12.93 | 10.37 |
Mean joint point efficiency (%) | 65.1 | 66.5 | 64.3 |
Mean joint point pressure ratio | 1.953 | 1.943 | 1.861 |
Maximum efficiency (%) | 73.029 | 73.845 | 73.901 |
Choke flow rate (kg/s) | 0.137 | 0.13 | 0.132 |
Performance index | 100.0 | 99.9 | 109.5 |
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Huang, R.; Ni, J.; Fan, H.; Shi, X.; Wang, Q. Investigating a New Method-Based Internal Joint Operation Law for Optimizing the Performance of a Turbocharger Compressor. Sustainability 2023, 15, 990. https://doi.org/10.3390/su15020990
Huang R, Ni J, Fan H, Shi X, Wang Q. Investigating a New Method-Based Internal Joint Operation Law for Optimizing the Performance of a Turbocharger Compressor. Sustainability. 2023; 15(2):990. https://doi.org/10.3390/su15020990
Chicago/Turabian StyleHuang, Rong, Jimin Ni, Houchuan Fan, Xiuyong Shi, and Qiwei Wang. 2023. "Investigating a New Method-Based Internal Joint Operation Law for Optimizing the Performance of a Turbocharger Compressor" Sustainability 15, no. 2: 990. https://doi.org/10.3390/su15020990