Effect of Cylinder Air Pressure and Hot Surface Temperature on Ignition Delay of Diesel Spray in a Constant Volume Combustion Chamber

Mohammad Salman,Sung Chul Kim

doi:10.3390/en12132565

Abstract

Present-day direct injection (DI) diesel engines with a high power density of displacement are not just promoting an expansion in the utilization of high-temperature resistant alloys in pistons yet, in addition, the expanded cylinder air pressures. When the temperature of the diesel engines piston exceeds a certain limit, it assumes a critical role at the start of sprays. The target of the present investigation was to look at the effects of cylinder air pressures (CAP) (10–25 bar) and high hot surface temperatures (HST) (350–450 °C). The ignition delay (ID) of pure diesel and that of diesel with Iftex clean system D (a cetane enhancer) are investigated experimentally. The experiments are performed by using a constant volume combustion chamber (CVCC) with a single hole pintle-type nozzle mounted on its head. A strong dependence of ID on the CAPs and HSTs was observed. A CAP of 25 bar is much inferior to the precombustion pressure of DI diesel engines; however, it is the case that combustion typical features are the same in spite of an inferior CAP, HST, and injection pressure. The ID tends to decrease to very small values with an increase in either of the two parameters. At a CAP of 25 bar, the measured ID of diesel with fuel additive is 45.8% lower than the pure diesel. Further, the ID of diesel with fuel additive at a 300 bar injection pressure and 25 bar CAP decreases at a rate of close to 0.2 ms/bar.

Highlights

Diesel engine can continue running on biodiesel mixed with pure diesel without alteration [1,2,3], and are of interest
The stainless steel plate acts as the hot surface inside the combustion chamber and is placed opposite the fuel injection nozzle on the other end of the chamber
Photosensors arerequired requiredforfor further progress in field this field because high pressure toID; a detailed features of the process can only be analyzed solely a photosensor methodology that short ignition delay (ID); detailed features of the process can only be analyzed solely a photosensor is endorsed in the study

Summary

Introduction

Diesel engine can continue running on biodiesel mixed with pure diesel without alteration [1,2,3], and are of interest. Huang et al [6] analytically examined the execution, combustion, and emission attributes of a solitary cylinder direct injection (DI) diesel engine using a balanced diesel–methanol blend with a maximum of 18% methanol. They noticed that ID increased with the amount of methanol in the diesel, causing an increase in the heat discharge rate in the premixed combustion stage and a decrease in the combustion span in the diffusion combustion stage. Ge et al [7] observed that the ID was diminished when the pilot injection timing approached the main injection timing

Methods

Discussion

Conclusion