Experimental Research of High-Temperature and High-Pressure Water Jet Characteristics in ICRC Engine Relevant Conditions

Zhe Kang, Zhehao Zhang, Jun Deng, Liguang Li and Zhijun Wu
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Zhe Kang: School of Automotive Engineering, Chongqing University, Chongqing 400044, China
Zhehao Zhang: School of Automotive Studies, Tongji University, Shanghai 201804, China
Jun Deng: School of Automotive Studies, Tongji University, Shanghai 201804, China
Liguang Li: School of Automotive Studies, Tongji University, Shanghai 201804, China
Zhijun Wu: School of Automotive Studies, Tongji University, Shanghai 201804, China

Energies, 2019, vol. 12, issue 9, 1-17

Abstract: The internal combustion Rankine cycle (ICRC) concept provides a potential solution for future high thermal efficiency and low emission powertrains, and direct water injection (DWI) proved to be the key parameter for ICRC optimization. This paper was dedicated to investigating the fundamental mechanisms of water spray characteristics under different water injection control parameters. In order to do so, an experimental test system was carefully designed and built based on the Bosch and Schlieren methods: the Bosch method is utilized to measure the effect of injection and ambient pressure on water injection characteristics, and the Schlieren method is utilized to investigate the impact of water injection and ambient temperature on water spray and evaporation processes. The experimental results indicate that both control parameters show important effects on water injection and spray characteristics. The water injection and ambient pressure show significant impacts on steady-state flow quantity and cyclic water injection quantity, and the water injection and ambient pressure affect the evaporation ability of water vapor within the spray which leads to a different variation trend during the initial, developing, and developed water spray stages. The results of this work can be used as fundamental supplements for ICRC, steam assistant technology (SAT), and DWI-related ICEs experimental and numerical researches, and provide extra information to understand the DWI process within engine-relevant conditions.

Keywords: water spray; spray characteristics; injection characteristics; Schlieren method; Bosch method; internal combustion Rankine cycle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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