Qualitative and quantitative analysis of spray characteristics of diesel and biodiesel blend on common-rail injection system

Abstract

An experimental study was performed on spray characteristics of spray diesel (D100) and biodiesel blend (BD65) injected into an atmospheric chamber. A qualitative analysis of spray images was conducted through exploiting the image processing with common image processing software. The results showed that the posterization of the images offered more detailed qualitative information on the spray compared to the more commonly-used threshold method. The posterized images showed the existence of layers in the spray with its transition at different grey levels. At lower injection, the spray tip penetration of BD65 was slightly lower than D100, whereas at high injection pressure, spray tip penetration of BD65 was higher than D100. Although BD65 had lower maximum velocity, the higher density of biodiesel may have resulted in greater momentum that enabled BD65 to have longer spray tip penetration at higher injection pressure. At higher injection pressure, the spray angle of BD65 tended to be less than that of D100.

Effects of Plateau Environment on Combustion and Emission Characteristics of a Plateau High-Pressure Common-Rail Diesel Engine with Different Blending Ratios of Biodiesel

“…Therefore, it is of great significance to study the effect of altitude changes on its combustion and emission characteristics [17][18][19][20][21]. The choice of fuel is also particularly important [22][23][24][25][26][27]. For example, a mixture of biodiesel and diesel fuel has a better combustion effect in the plateau environment [28].…”

Analysis of diesel engine injector nozzle spray characteristics fueled with residual fuel oil

“…For instance, in Nigeria today, the electric power challenge faced by the country has forced manufacturing/production companies to rely mostly on internal combustion power plants as prime movers for the production of electricity. These power plants include petrol, diesel, and gas engines, but diesel and gas engines favour heavy duty and high energy demand application with diesel engines having advantages of lower running and capital costs, ease of installation, simple plant layout, and availability of fuel over the gas engines and hence, are widely used in the manufacturing/production industries [ 1 , 2 ]. The Fuel injection systems in modern diesel engines are designed to meet the highest level of fuel economy, drivability, and rapid response, easy and accurate control while complying with very stringent environmental standards.…”

Experimental Research on the Injection Rate of DME and Diesel Fuel in Common Rail Injection System by Using Bosch and Zeuch Methods

“…The research on the effects of the spray angle and injection strategies (single injection, multi-injection, etc.) on the combustion characteristics [11][12][13][14] which are composed of particle size distribution [13], spray characteristics in a various pressure condition [14][15][16], combustion and emission performances, and EGR rate [17]-was investigated via numerical and experimental methodologies. Homogeneous charge compression ignition (HCCI) and bulk combustion were also investigated.…”