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Spray Characteristics of rp-3 jet fuel at Non-Evaporating and Evaporating Environments

Journal of Thermal Science 2023年第1期32卷 438-447页

作者： ZHAO Tongbin LYU Delin DUAN Yaozong HUANG Zhen HAN Dong Key Laboratory for Power Machinery and Engineering Ministry of EducationShanghai Jiao Tong UniversityShanghai 200240China Shaanxi Diesel Heavy Industry Ltd. Xingping 713105China

Spray experiments of rp-3 jet fuel at non-evaporating and evaporating environments were studied on a constant volume spray chamber,and diffusive back-imaging technique was used to capture the transient spray development *** tip penetration,projected spray area and cone angle of rp-3 jet fuel were derived from the spray development images,and compared to those of diesel *** is observed that non-evaporating sprays of rp-3 jet fuel and diesel fuel do not exhibit significant differences,as their spray penetration distances,projected spray areas and spray cone angles are consistent at most test *** evaporating sprays of rp-3 jet fuel produce shorter liquid-phase penetration distances and lower projected spray areas than those of diesel fuel,and these differences are particularly pronounced at low ambient ***,fuel effects on the evaporating spray cone angle are ***,increased ambient density or ambient temperature shortens the liquid-phase spray penetration distance and reduces the liquid-phase spray area,and these effects are more pronounced for diesel fuel than rp-3 jet fuel.

关键词： rp-3 jet fuel spray constant volume chamber evaporating non-evaporating

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An experimental study on spray auto-ignition of rp-3 jet fuel and its surrogates

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Frontiers in Energy 2021年第2期15卷 396-404页

作者： Yaozong DUAN Wang LIU Zhen HUANG Dong HAN Key Laboratory for Power Machinery and Engineering(Ministry of Education) Shanghai Jiao Tong UniversityShanghai 200240China

jet fuel is widely used in air transportation,and sometimes for special vehicles in ground *** the latter case,fuel spray auto-ignition behavior is an important index for engine operation *** fuel is usually used for fundamental combustion study due to the complex composition of practical *** for jet fuels,two-component or three-component surrogate is usually selected to emulate practical *** spray auto-ignition characteristics of rp-3 jet fuel and its three surrogates,the 70%mol n-decane/30%mol 1,2,4-trimethylbenzene blend(Surrogate 1),the 51%mol n-decane/49%mol 1,2,4-trimethylbenzene blend(Surrogate 2),and the 49.8%mol n-dodecane/21.6%mol iso-cetane/28.6%mol toluene blend(Surrogate 3)were studied in a heated constant volume combustion *** 1 and Surrogate 2 possess the same components,but their blending percentages are different,as the two surrogates were designed to capture the H/C ratio(Surrogate 1)and DCN(Surrogate 2)of rp-3 jet fuel,*** 3 could emulate more physiochemical properties of rp-3 jet fuel,including molecular weight,H/C ratio and *** results indicate that Surrogate 1 overestimates the auto-ignition propensity of rp-3 jet fuel,whereas Surrogates 2 and 3 show quite similar auto-ignition propensity with rp-3 jet ***,to capture the spray auto-ignition behaviors,DCN is the most important parameter to match when designing the surrogate ***,as the ambient temperature changes,the surrogates matching DCN may still show some differences from the rp-3 jet fuel,e.g.,the first-stage heat release influenced by low-temperature chemistry.

关键词： rp-3 jet fuel surrogate spray auto-ignition constant volume combustion chamber

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Combustion and emissions of rp-3 jet fuel and diesel fuel in a single-cylinder diesel engine

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Frontiers in Energy 2023年第5期17卷 664-677页

作者： Tongbin ZHAO Zhe REN Kai YANG Tao SUN Lei SHI Zhen HUANG Dong HAN Key Laboratory for Power Machinery and Engineering of the Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240China

The combustion characteristics and emission behaviors of rp-3 jet fuel were studied and compared to commercial diesel fuel in a single-cylinder compression ignition(CI)*** operational parameters,including engine load(0.6,0.7,and 0.8 MPa indicating the mean effective pressure(IMEP)),the exhaust gas recirculation(EGR)rate(0%,10%,20%,and 30%),and the fuel injection timing(–20,–15,–10,and–5°crank angle(CA)after top dead center(ATDC))were adjusted to evaluate the engine performances of rp-3 jet fuel under changed operation *** comparison to diesel fuel,rp-3 jet fuel shows a retarded heat release and lagged combustion phase,which is more obvious under heavy EGR rate *** addition,the higher premixed combustion fraction of rp-3 jet fuel leads to a higher first-stage heat release peak than diesel fuel under all testing *** a result,rp-3 jet fuel features a longer ignition delay(ID)time,a shorter combustion duration(CD),and an earlier CA50 than diesel *** experimental results manifest that rp-3 jet fuel has a slightly lower indicated thermal efficiency(ITE)compared to diesel fuel,but the ITE difference becomes less noticeable under large EGR rate *** with diesel fuel,the nitrogen oxides(NOx)emissions of rp-3 jet fuel are higher while its soot emissions are *** NOx emissions of rp-3 can be effectively reduced with the increased EGR rate and delayed injection timing.

关键词： rp-3 jet fuel diesel engine combustion emissions

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An experimental study on rp-3 jet fuel injection on a common rail injection system

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Journal of Central South University 2022年第7期29卷 2179-2188页

作者： ZHAO Tong-bin WU Yi-sheng DUAN Yao-zong HUANG Zhen HAN Dong Key Laboratory for Power Machinery and Engineering Ministry of EducationShanghai Jiao Tong UniversityShanghai 200240China China-UK Low Carbon College Shanghai Jiao Tong UniversityShanghai 200240China

rp-3 jet fuel could be an alternative fuel for diesel *** this study,the injection characteristics of rp-3jet fuel under single and split injection strategies were investigated and compared with diesel *** experimental results indicate that rp-3 jet fuel has slightly shorter injection delay time than diesel fuel,but this difference is negligible in actual engine ***,although the lower density and viscosity of rp-3 jet fuel lead to higher volumetric injection rates and cycle-based injection quantities,the cycle-based injection mass and the mass injection rates at the stable injection stage of rp-3 jet fuel are close to or slightly lower than those of diesel *** on these experimental observations,it could be concluded that fuel physical properties are the secondary factor influencing the injection characteristics in both single and split injection strategies,as rp-3 jet fuel and diesel fuel are taken for comparison.

关键词： rp-3 jet fuel diesel engine single injection pilot-main injection common rail injection system

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