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Spray Characteristics of RP-3 Jet Fuel at Non-Evaporating and Evaporating Environments 被引量:1
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作者 ZHAO Tongbin LYU Delin +2 位作者 duan yaozong HUANG Zhen HAN Dong 《Journal of Thermal Science》 SCIE EI CAS CSCD 2023年第1期438-447,共10页
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 developme... 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 processes.Spray 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 fuel.It 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 conditions.The 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 temperatures.However,fuel effects on the evaporating spray cone angle are insignificant.Further,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. 展开更多
关键词 RP-3 jet fuel SPRAY constant volume chamber EVAPORATING non-evaporating
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Pressure-Based Approach to Estimating the Injection Start and End in Single and Split Common Rail Injection Processes
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作者 ZHAI Jiaqi duan yaozong HAN Dong 《Journal of Shanghai Jiaotong university(Science)》 EI 2018年第S1期28-33,共6页
Fuel injection timing is an important control parameter for engine combustion optimization and emissions control. However, the actual fuel injection timing is different from the nominal one commanded by the electronic... Fuel injection timing is an important control parameter for engine combustion optimization and emissions control. However, the actual fuel injection timing is different from the nominal one commanded by the electronic control unit, due to the system hydraulic lag or the possible communication malfunction. In this study,a simple estimate approach based on the injector inlet pressure is proposed to capture four critical characteristic instants at the start and end of injection. The critical characteristic moments estimated using this pressure-based approach are validated against those determined by the actual injection rate profiles, in the context of different single or split injection processes. The comparison revealed that the characteristic injection moments estimated by the injector inlet pressures and those determined by the actual injection rate profiles have a satisfactory agreement, certifying the broad applicability and reliability of this pressure-based approach in the detection of the real fuel injection start and end time. 展开更多
关键词 injector inlet pressure common rail injection system injection diagnostics single injection split injection
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