Effects of droplet evaporation on calibration of KH-RT break-up model for high-pressure evaporating diesel sprays

2021 ◽  
Author(s):  
Ping YI ◽  
Yunpeng Fu ◽  
Tie Li
Keyword(s):  
High Pressure ◽  
Droplet Evaporation ◽  
Diesel Sprays ◽  
Break Up

Modeling Atomization and Break Up in High-Pressure Diesel Sprays

1997 ◽  
Author(s):  
C. Habchi ◽  
D. Verhoeven ◽  
C. Huynh Huu ◽  
L. Lambert ◽  
J. L. Vanhemelryck ◽  
...  
Keyword(s):  
High Pressure ◽  
Diesel Sprays ◽  
Break Up

Structure of high-pressure diesel sprays

2001 ◽  
Author(s):  
M. Gavaises ◽  
C. Arcoumanis ◽  
A. Theodorakakos ◽  
G. Bergeles
Keyword(s):  
High Pressure ◽  
Diesel Sprays

Numerical Study of Bicomponent Droplet Vaporization in a High Pressure Environment

1996 ◽  
Author(s):  
J. Stengele ◽  
H.-J. Bauer ◽  
S. Wittig
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Gas Phase ◽  
Numerical Study ◽  
Droplet Evaporation ◽  
Single Component ◽  
Vapor Concentration ◽  
Diffusion Limit ◽  
Evaporation Process ◽  
Droplet Vaporization

The understanding of multicomponent droplet evaporation in a high pressure and high temperature gas is of great importance for the design of modern gas turbine combustors, since the different volatilities of the droplet components affect strongly the vapor concentration and, therefore, the ignition and combustion process in the gas phase. Plenty of experimental and numerical research is already done to understand the droplet evaporation process. Until now, most numerical studies were carried out for single component droplets, but there is still lack of knowledge concerning evaporation of multicomponent droplets under supercritical pressures. In the study presented, the Diffusion Limit Model is applied to predict bicomponent droplet vaporization. The calculations are carried out for a stagnant droplet consisting of heptane and dodecane evaporating in a stagnant high pressure and high temperature nitrogen environment. Different temperature and pressure levels are analyzed in order to characterize their influence on the vaporization behavior. The model employed is fully transient in the liquid and the gas phase. It accounts for real gas effects, ambient gas solubility in the liquid phase, high pressure phase equilibrium and variable properties in the droplet and surrounding gas. It is found that for high gas temperatures (T = 2000 K) the evaporation time of the bicomponent droplet decreases with higher pressures, whereas for moderate gas temperatures (T = 800 K) the lifetime of the droplet first increases and then decreases when elevating the pressure. This is comparable to numerical results conducted with single component droplets. Generally, the droplet temperature increases with higher pressures reaching finally the critical mixture temperature of the fuel components. The numerical study shows also that the same tendencies of vapor concentration at the droplet surface and vapor mass flow are observed for different pressures. Additionally, there is almost no influence of the ambient pressure on fuel composition inside the droplet during the evaporation process.

Modeling droplet break-up effects for high pressure cryogenic spray combustion codes

2000 ◽  
Author(s):  
I. Gokalp ◽  
E. Bodele ◽  
R. Cousty ◽  
B. Vieille ◽  
E. Fedioun ◽  
...  
Keyword(s):  
High Pressure ◽  
Spray Combustion ◽  
Break Up

Two-dimensional simulations of droplet evaporation and deformation at high pressure

1992 ◽  
Author(s):  
ZHENG-TAO DENG ◽  
RON LITCHFORD ◽  
SHENGHUN JENG ◽  
SAN-MOU JENG
Keyword(s):  
High Pressure ◽  
Droplet Evaporation ◽  
Two Dimensional

Modelling thermal effects in cavitating high-pressure diesel sprays using an improved compressible multiphase approach

Fuel ◽  
2018 ◽  
Vol 222 ◽  
pp. 125-145 ◽  
Author(s):  
H. Yu ◽  
L. Goldsworthy ◽  
P.A. Brandner ◽  
J. Li ◽  
V. Garaniya
Keyword(s):  
High Pressure ◽  
Thermal Effects ◽  
Diesel Sprays

Bending and break-up of a liquid jet in a high pressure airflow

2003 ◽  
Vol 27 (4) ◽  
pp. 449-454 ◽  
Author(s):  
A. Cavaliere ◽  
R. Ragucci ◽  
C. Noviello
Keyword(s):  
High Pressure ◽  
Liquid Jet ◽  
Break Up
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