高速红外成像分析柴油发动机与CH4_Air

High-Speed Infrared Imaging for Analysis of a Diesel Engine Supplied with a Premixed Methane-Air Charge

Efforts are continuously made to improve internal combustion engines’ (ICEs) efficiency. Lowering fuel consumption and reducing soot formation are among the challenges being addressed when seeking to improve engine designs. In this work, ICE characterization was carried out on an optical engine at Istituto Motori Consiglio Nazionale delle Ricerche (CNR), in Napoli, Italia. The setup consists of an elongated single-cylinder diesel engine equipped with the multi-cylinder head of a conventional car and a common rail injection system. In this system, the piston’s crown is replaced by a sapphire window in order to carry out imaging of the combustion bowl. Imaging is achieved while the engine is in operation by looking at a 45° fixed mirror located in the extended piston axis. Infrared imaging was carried out at 26 kHz, leading to a temporal resolution of about 0.35° crankshaft angle at 1500 RPM. In the experiment, air was replaced by a premixed air-methane charge in order to improve combustion and lower the amount of soot deposits. The different phases of a combustion cycle, i.e. intake, compression, fuel injection, working stroke and exhaust, were investigated using four different spectral filters (broadband, CO2 red-spike, through-flame, hydrocarbon and methane). The results illustrate how high-speed IR imaging can provide unique insights for research on ICEs.


高速红外成像分析柴油发动机与CH4_Air.jpg

下一篇增材制造
分享到:
京公网安备11010802023713
联系方式
 
 
 
 

欢迎您联系我们

联系电话

010-88850488

13501181057