Experimental Study on Effect of Water Injection Temperature on Combustion and Performance of In-cylinder Water Injection Diesel Engine

doi:10.11908/j.issn.0253-374x.2019.10.015

Home > Archive>Volume 47, Issue 10, 2019 >1493-1499. DOI:10.11908/j.issn.0253-374x.2019.10.015

Experimental Study on Effect of Water Injection Temperature on Combustion and Performance of In-cylinder Water Injection Diesel Engine
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                        10.11908/j.issn.0253-374x.2019.10.015
                    
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                        KANG ZheKANG Zhe
School of Automotive Engineering, Chongqing University, Chongqing 400044, China
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JIANG LangJIANG Lang
School of Automotive Studies, Tongji University, Shanghai 201804, China
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DENG JunDENG Jun
School of Automotive Studies, Tongji University, Shanghai 201804, China
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WU ZhijunWU Zhijun
School of Automotive Studies, Tongji University, Shanghai 201804, China
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Abstract:

Based on a two-cylinder mechanical pump diesel engine, combined with self-developed high pressure common rail injection system, in-cylinder high temperature water injection system and high performance control platform, the effect of water injection temperature on combustion and performance of diesel engine was investigated. The results indicate that, by improving water injection temperature from 25 ℃ to 160 ℃, the evaporation rate of in-cylinder water vapor is enhanced, the mass of in-cylinder work fluid is improved, therefore, the work during expansion stroke can be optimized about 49.5 J, and an 8% enhancement in thermal efficiency of the diesel engine can be achieved. Meanwhile, the optimized water vapor evaporation speed is beneficial to the decrement of combustion cyclic fluctuation.

Key words:diesel engine; in-cylinder water injection; water injection temperature; performance optimization

Reference

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KANG Zhe, JIANG Lang, DENG Jun, WU Zhijun. Experimental Study on Effect of Water Injection Temperature on Combustion and Performance of In-cylinder Water Injection Diesel Engine[J].同济大学学报(自然科学版),2019,47(10):1493~1499

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Received:January 07,2019
Revised:July 22,2019
Adopted:April 19,2019
Online: October 17,2019
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