Methane Concentration Influence on Combustion in a Rapid Compression Machine under DFICE Relevant Conditions

作     者：R.Clemente-Mallada A.Peter S.Riess L.Strauss H.Fajri M.Wensing 

作者机构：Fluid Systems EngineeringFriedrich-Alexander UniversityCauerstrasse 4Erlangen-Tennenlohe 91058Germany 

出 版 物：《Journal of Mechanics Engineering and Automation》 (机械工程与自动化（英文版）)

年 卷 期：2023年第13卷第2期

页      面：40-53页

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：the European Research Council with a“Horizon Europe:Marie Skłodowska-Curie Actions”grant and it can be disseminated freely 

主　　题：Dual-fuel natural gas diesel rapid compression machine ID. 

摘      要：In this experimental work,an optically accessible rapid compression machine is used to study the ignition and combustion process under engine relevant operation conditions for five different air-natural gas equivalence ratios(λ)ignited with either 12.2 mg or 6.7 mg of pilot diesel injected at 1,600 *** temperature of the ambient mixture,walls and injector was 333 ***,for the short(6.7 mg)diesel injection,the variation in the ID(ignition delay)for two higher ambient temperatures(343 K and 353 K)was *** and piston displacement are recorded while two high-speed cameras simultaneously capture signals in the visible range spectrum and at 305 nm wavelength for OH^(*)chemiluminescence *** is measured both from OH^(*)and pressure *** the recorded data,the heat release ratio is estimated and compared with the visual *** gives an insight of the temporal and spatial evolution of the flame,as well as a qualitative perception of the transition from spray ignition into a premixed flame in the ambient fuel-air *** was found that increasing the methane concertation delays the ignition,reduces the natural flame luminosity and enhances the OH^(*)chemiluminescence signal.