Experiments on spray characteristics of diesel-biodiesel-pentanol fuels

doi:10.3969/j.issn.1674-8484.2021.04.018

Abstract

Abstract:

This paper investigated the macroscopic and microscopic spray characteristics of diesel, bio-diesel, n-pentanol, and their oxygenated blends by using high-speed photography and Phase Doppler Particle Analyzer (PDPA) for fuel-engine co-optimization. Conducted some experiments in a constant volume vessel to investigate the effects of fuel property, injection pressure, ambient pressure, and ambient temperature. The results show that compared with diesel, bio-diesel has larger liquid phase penetration and smaller cone angle; And n-pentanol has the smallest liquid phase penetration; The Sauter mean diameter (SMD) of fuel sprays decreased with the increase of injection pressure from 40 to 120 MPa and the decrease of ambient pressure. Among all the fuels, bio-diesel has the largest SMD while n-pentanol exhibits the smallest SMD due to its low viscosity and surface tension. Density, viscosity, boiling point, and surface tension are identified as the key fuel properties affecting the spray characteristics, especially in high temperature conditions (830 K). Therefore the fuel physicochemical property complementation improves spray characteristics.

Key words: engine mixed fuels, bio-diesel, pentanol, spray characteristics, phase Doppler particle analyzer(PDPA), physicochemical property complementation

CLC Number:

TK428.9

LI Li, LI Yanfei, QIN Song. Experiments on spray characteristics of diesel-biodiesel-pentanol fuels[J]. Journal of Automotive Safety and Energy, 2021, 12(4): 587-595.

Figures/Tables 15

References 24

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燃料	十六烷值	20 ℃粘度 mm²·s^-1	20 ℃密度 kg·m³	表面张力/ mN·m	汽化潜热 kJ·kg	含氧质量分数,w / %	馏出温度 / ℃
燃料	十六烷值	20 ℃粘度 mm²·s^-1	20 ℃密度 kg·m³	表面张力/ mN·m	汽化潜热 kJ·kg	含氧质量分数,w / %	V_fra/mL = 10	50	90
D100	56.5	4.127	830.4	27.5	270	0.0	223	266	311
B100	61.7	7.159	871.4	30.3	258	11.1	323	326	335
P100	25.0	2.890	815.0	24.7	308	18.2	138*	138*	138*
D40B30P30	48.0	3.900	838.1	26.9	–	8.8	135	264	310

燃料	十六烷值	20 ℃粘度 mm²·s^-1	20 ℃密度 kg·m³	表面张力/ mN·m	汽化潜热 kJ·kg	含氧质量分数,w / %	馏出温度 / ℃
燃料	十六烷值	20 ℃粘度 mm²·s^-1	20 ℃密度 kg·m³	表面张力/ mN·m	汽化潜热 kJ·kg	含氧质量分数,w / %	V_fra/mL = 10	50	90
D100	56.5	4.127	830.4	27.5	270	0.0	223	266	311
B100	61.7	7.159	871.4	30.3	258	11.1	323	326	335
P100	25.0	2.890	815.0	24.7	308	18.2	138*	138*	138*
D40B30P30	48.0	3.900	838.1	26.9	–	8.8	135	264	310

T / K	p_inj / MPa	p_amb / MPa	ρ / （kg·m^-3）	Δt_j / ms
	40	1.2	14	1.5
298	80	1.8	21	1.5
	120	2.5	29	1.5
	40	3.0	13	1.5
830	80	4.0	17	1.5
	120	5.0	21	1.5

T / K	p_inj / MPa	p_amb / MPa	ρ / （kg·m^-3）	Δt_j / ms
	40	1.2	14	1.5
298	80	1.8	21	1.5
	120	2.5	29	1.5
	40	3.0	13	1.5
830	80	4.0	17	1.5
	120	5.0	21	1.5