Open Access

ARTICLE

Influence of Aviation Kerosene-Diesel Blending Ratios on Ignition Behavior and Spray Dynamics

Hailong Chen^1,*, Guanzhen Tao¹, Daijun Wei², Guangyao Ouyang³

1 Mechanical Electrical Management Department, China Coast Guard Academy, Ningbo, 315801, China
2 College of Power and Energy Engineering, Harbin Engineering University, Harbin, 150001, China
3 College of Power Engineering, Navy University of Engineering, Wuhan, 430030, China

* Corresponding Author: Hailong Chen. Email:

(This article belongs to the Special Issue: Model-Based Approaches in Fluid Mechanics: From Theory to industrial Applications)

Fluid Dynamics & Materials Processing 2025, 21(10), 2527-2538. https://doi.org/10.32604/fdmp.2025.069569

Received 26 June 2025; Accepted 19 September 2025; Issue published 30 October 2025

Abstract

Modifications in fuel spray characteristics fundamentally influence fuel–air mixing dynamics in diesel engines, thereby significantly affecting combustion performance and emission profiles. This study explores the operational behavior of RP-5 aviation kerosene/diesel blended fuels in marine diesel engines. A spray visualization platform based on Mie scattering technology was developed to comparatively analyze the spray characteristics, ignition behavior, and soot emissions of RP-5 aviation kerosene, conventional-35# diesel, and their blends at varying mixing ratios (D100H0, D90H10, D70H30, D50H50, D30H70, D0H100). The findings demonstrate that, under constant injection pressure, aviation kerosene combustion results in a more uniform temperature field, characterized by lower core flame temperatures, broader high-temperature regions, and reduced soot concentrations with spatially homogeneous distribution and no pronounced peaks. In terms of spray dynamics, increasing the proportion of aviation kerosene leads to a marked widening of the spray cone angle. Meanwhile, spray penetration length exhibits a non-monotonic trend—initially decreasing and subsequently increasing—as the kerosene blending ratio rises.

---

Keywords

---