TED-AJ03-397 HOMOGENEOUS CHARGE COMPRESSION IGNITION COMBUSTION WITH DIMETHYL ETHER : ANALYSIS OF TWO-STAGE HEAT RELEASE
スポンサーリンク
概要
- 論文の詳細を見る
Although homogeneous charge compression ignition (HCCI) engines are expected to have both higher thermal efficiency and lower nitrogen oxide (NOx) emissions, they still have problems with high hydrocarbon (HC) and carbon monoxide (CO) production, high rates of heat release, and difficulty in controlling auto-ignition. In order to control auto-ignition in HCCI engines, the reaction mechanism of auto-ignition must be understood. Dimethyl ether (DME), a promising alternative fuel that is suitable for compression ignition engines, shows very strong low-temperature kinetic reactions in HCCI. HCCI combustion shows a peculiar two-stage heat release. The first stage of the heat release curve is associated with low-temperature kinetic reactions, and the time delay between the first and main heat release is attributed to the negative temperature coefficient regime. A study of HCCI fueled with DME may provide useful information on the low-temperature kinetic reactions in HCCI operation. This study investigated the auto-ignition characteristics of an HCCI engine fueled with DME using a single[figure] cylinder engine with a transparent piston. The engine was operated at 800 rpm with a wide-open throttle. The intake-premixed mixture was preheated with an electric heater to promote auto-ignition. HCCI combustion was examined using instantaneous flame images obtained from a high-speed video. The influences of equivalence ratio and intake temperature on the characteristics of auto-ignition in the HCCI engine were investigated. Spectrum analyses of chemiluminescence using spectroscopy were carried out to investigate the two-stage heat release. Three main conclusions were drawn from this study. (1) The hot-flame reaction progresses homogeneously. DME combustion was found to be non-luminous. (2) With increasing intake temperature and equivalence ratio, varying heat release was observed. Three-stage heat release was also observed. (3) During the main heat release, the CO-O recombination spectrum was strong. There was a strong correlation between rate of heat release and the CO-O recombination spectrum.[figure]
- 一般社団法人日本機械学会の論文
著者
-
Tomita Eiji
Okayama University
-
Kawahara Nobuyuki
Department Of Information System Engineering Graduate School Of Information Science And Technology O
-
Kawahara Nobuyuki
Department Of Mechanical Engineering Okayama University
-
Kagajyo Hisashi
Okayama University
関連論文
- Characterization of the Spray of the DISI Multi-hole Injector by Means of Phase Doppler Anemometer
- Wireless Digital Video Transmission System Using IEEE802.11b PHY with Error Correction Block Based ARQ Protocol(Special Issue on Mobile Multimedia Communications)
- Ion Current in a Homogeneous Charge Compression Ignition Engine
- (2-08) Effects of Swirl Turbulent Flow Field and Inhomogeneous Concentration Field on Combustion of Fuel-Air Mixture in a Constant Volume Vessel((SI-3)S. I. Engine Combustion 3-Flow and Combustion)
- B307 Flame Propagation of Inhomogeneous Feel-Air Mixture with Swirl in a Constant-Volume Vessel(Turbulent flame-2)
- E308 A Study on Hydrogen Combustion Ignited with Light Oil in a Dual Fuel Engine(Engine performance)
- Measurement of fuel concentration distribution of transient hydrogen jet and its flame using planar laser induced fluorescence method
- A New Method of Fractal Analysis Using Wavelet Transform and its Application in Tumbling Flow Analysis(Recent Combustion Technology in Internal Combustion Engines)
- Wavelet Transform Analysis of Unsteady Turbulence and Turbulent Burning Velocity in a Constant-Volume Vessel
- (2-07) Analysis of Fractal Characteristics of tumbling flow in a Spark Ignition Engine Using Wavelet Transform((SI-3)S. I. Engine Combustion 3-Flow and Combustion)
- TED-AJ03-397 HOMOGENEOUS CHARGE COMPRESSION IGNITION COMBUSTION WITH DIMETHYL ETHER : ANALYSIS OF TWO-STAGE HEAT RELEASE
- Evaluation of the Flame Lift-off Length in Diesel Spray Combustion Based on Flame Extinction
- Knocking detection using wavelet instantaneous correlation method
- SC3-2: Effect of Nozzle Geometry on Atomization of Transient Spray from Port Fuel Injector(SC: Spray and Spray Combustion,General Session Papers)
- SC4-1: Spray Behavior near the Nozzle of a DISI Multi-Hole Injector Using Phase Doppler Anemometer(SC: Spray and Spray Combustion,General Session Papers)