Comparison of Three Evaporation Models Combined to the Distillation Curve Model for Multicomponent Fuel Droplet Evaporation

2011 ◽  
Author(s):  
Patrice Seers ◽  
Simon Bruyère-Bergeron ◽  
Xavier Landry
Keyword(s):  
Droplet Evaporation ◽  
Fuel Droplet ◽  
Distillation Curve ◽  
Curve Model ◽  
Evaporation Models

Droplet evaporation modeling by the distillation curve model: accounting for kerosene fuel and elevated pressures

2003 ◽  
Vol 46 (23) ◽  
pp. 4403-4412 ◽  
Author(s):  
M. Burger ◽  
R. Schmehl ◽  
K. Prommersberger ◽  
O. Schäfer ◽  
R. Koch ◽  
...  
Keyword(s):  
Droplet Evaporation ◽  
Distillation Curve ◽  
Elevated Pressures ◽  
Curve Model

An Engineering Calculation Method for Multi-Component Stagnant Droplet Evaporation With Finite Diffusivity

1994 ◽  
Author(s):  
J. S. Chin
Keyword(s):  
Heat Transfer ◽  
Diffusion Coefficient ◽  
Liquid Phase ◽  
Vapor Pressure ◽  
Molecular Mass ◽  
Calculation Method ◽  
Engineering Calculation ◽  
Droplet Evaporation ◽  
Diffusion Resistance ◽  
Distillation Curve

A practical engineering calculation method has been formulated for commercial multicomponent fuel stagnant droplet evaporation with variable finite mass and thermal diffusivity. Instead of solving the transient liquid phase mass and heat transfer partial differential equation set, a totally different approach is used. With zero or infinite mass diffusion resistance in liquid phase, it is possible to obtain vapor pressure and vapor molecular mass based on the distillation curve of these turbine fuels. It is determined that Peclet number (Pef) is a suitable parameter to represent the mass diffusion resistance in liquid phase. The vapor pressure and vapor molecular mass at constant finite Pef is expressed as a function of finite Pef, vapor pressure, and molecular mass at zero Pef and infinite Pef. At any time step, with variable finite Pef, the above equation is still valid, and PFsPef=∞, PFsPef=0, MfvPef=∞, MfvPef=0 are calculated from PFsPef≡∞, PFsPef≡0, MfvPef≡∞, MfvPef≡0, thus PFs and Mfv can be determined in a global way which eventually is based on the distillation curve of fuel. The explicit solution of transient heat transfer equation is used to have droplet surface temperature and droplet average temperature as a function of surface Nusselt number and non-dimensional time. The effect of varying com position of multi-component fuel evaporation is taken into account by expressing the properties as a function of molecular mass, acentric factor, critical temperature, and critical pressure. A specific calculation method is developed for liquid fuel diffusion coefficient, also special care is taken to calculate the binary diffusion coefficient of fuel vapor-air in gaseous phase. The effect of Stefan flow and natural convection has been included. The predictions from the present evaporation model for different turbine fuels under very wide temperature ranges have been compared with experimental data with good agreement.

A Semi-Analytical Model for Evaporating Fuel Droplets

2005 ◽  
Vol 127 (2) ◽  
pp. 199-203 ◽  
Author(s):  
Achintya Mukhopadhyay ◽  
Dipankar Sanyal
Keyword(s):  
Gas Phase ◽  
Computational Cost ◽  
Lewis Number ◽  
Droplet Evaporation ◽  
Solution Procedure ◽  
Droplet Surface ◽  
Spray Combustion ◽  
Fuel Droplet ◽  
Cfd Model ◽  
Fuel Droplets

An algorithm for solution of a model for heating and evaporation of a fuel droplet has been developed. The objective of the work is to develop a computationally economic solution module for simulating droplet evaporation that can be incorporated in spray combustion CFD model that handles a large number of droplets. The liquid-phase transient diffusive equation has been solved semi-analytically, which involves a spatially closed-form and temporally discretized solution procedure. The model takes into account droplet surface regression, nonunity gas-phase Lewis number and variation of latent heat with temperature. The accuracy of the model is identical to a Finite Volume solution obtained on a very fine nonuniform grid, but the computational cost is significantly less, making this approach suitable for use in a spray combustion code. The evaporation of isolated heptane droplet in a quiescent ambient has been investigated for ambient pressures of 1 to 5 bar.

Multicomponent fuel droplet evaporation using 1D Global Rainbow Technique

2017 ◽  
Vol 36 (2) ◽  
pp. 2401-2408 ◽  
Author(s):  
Jantarat Promvongsa ◽  
Pumyos Vallikul ◽  
Bundit Fungtammasan ◽  
Annie Garo ◽  
Gerard Grehan ◽  
...  
Keyword(s):  
Droplet Evaporation ◽  
Fuel Droplet

EXPERIMENTAL STUDY OF PURE AND MULTICOMPONENT FUEL DROPLET EVAPORATION IN A HEATED AIR FLOW

1997 ◽  
Vol 7 (3) ◽  
pp. 317-337 ◽  
Author(s):  
G. Chen ◽  
Suresh Aggarwal ◽  
Thomas A. Jackson ◽  
G. L. Switzer
Keyword(s):  
Experimental Study ◽  
Air Flow ◽  
Droplet Evaporation ◽  
Fuel Droplet ◽  
Heated Air
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