Determination of vapor pressure from droplet evaporation kinetics

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.

Determination of the Vapor Pressure and Evaporation Enthalpy of CeO2 Nano-Fuels Based on Isothermogravimetry

International Journal of Thermophysics ◽

10.1007/s10765-021-02924-8 ◽

2021 ◽

Vol 43 (1) ◽

Author(s):

Qian Ji ◽

Deqing Mei ◽

Chao Sun ◽

Zongning Zhu ◽

Dongmei Guo

Keyword(s):

Vapor Pressure ◽

Evaporation Enthalpy

The Use of Thermal Evolution Analysis (TEA) for the Determination of Vapor Pressure of Agricultural Chemicals

Analytical Calorimetry ◽

10.1007/978-1-4757-4509-2_15 ◽

1974 ◽

pp. 185-198 ◽

Cited By ~ 3

Author(s):

Roger L. Blaine ◽

Paul F. Levy

Keyword(s):

Vapor Pressure ◽

Thermal Evolution ◽

Agricultural Chemicals ◽

Evolution Analysis

Density Determination of Cryogenic Liquids as a Function of Saturated Vapor Pressure

Advances in Cryogenic Engineering ◽

10.1007/978-1-4757-0528-7_30 ◽

1963 ◽

pp. 251-255 ◽

Cited By ~ 1

Author(s):

T. C. Shupert

Keyword(s):

Vapor Pressure ◽

Saturated Vapor Pressure ◽

Saturated Vapor ◽

Density Determination ◽

Cryogenic Liquids

Vapor pressure curve determination of α-lipoic acid raw material and capsules by dynamic thermogravimetric method

Thermochimica Acta ◽

10.1016/j.tca.2012.06.030 ◽

2012 ◽

Vol 544 ◽

pp. 95-98 ◽

Cited By ~ 5

Author(s):

Alyne da Silva Portela ◽

Maria das Graças Almeida ◽

Ana Paula Barreto Gomes ◽

Lidiane Pinto Correia ◽

Paulo Cesar Dantas da Silva ◽

...

Keyword(s):

Vapor Pressure ◽

Lipoic Acid ◽

Raw Material ◽

Pressure Curve ◽

Thermogravimetric Method ◽

Vapor Pressure Curve ◽

Curve Determination

Determination of the vapor pressure of rubidium by optical absorption

Journal of the Optical Society of America ◽

10.1364/josa.63.000864 ◽

1973 ◽

Vol 63 (7) ◽

pp. 864 ◽

Cited By ~ 54

Author(s):

A. Gallagher ◽

E. L. Lewis

Keyword(s):

Optical Absorption ◽

Vapor Pressure

Direct Manometric Determination of Vapor Pressure

Current Protocols in Food Analytical Chemistry ◽

10.1002/0471142913.faa0204s01 ◽

2001 ◽

Vol 1 (1) ◽

pp. A2.4.1-A2.4.6

Author(s):

M.S. Rahman ◽

S.S. Sablani ◽

N. Guizani ◽

T.P. Labuza ◽

P.P. Lewiki

Keyword(s):

Vapor Pressure ◽

Manometric Determination

The Preparation of OF2and Determination of its Vapor Pressure.

The Journal of Physical Chemistry ◽

10.1021/j150494a019 ◽

1952 ◽

Vol 56 (2) ◽

pp. 233-234 ◽

Cited By ~ 10

Author(s):

J. G. Schnizlein ◽

J. L. Sheard ◽

R. C. Toole ◽

T. D. O'Brien

Keyword(s):

Vapor Pressure

Application of Continuous Thermodynamics Method to Fuel Droplet Evaporation

ASME 2012 Internal Combustion Engine Division Fall Technical Conference ◽

10.1115/icef2012-92177 ◽

2012 ◽

Author(s):

Way Lee Cheng ◽

Cai Shen ◽

Chia-fon F. Lee

Keyword(s):

Liquid Phase ◽

Effective Properties ◽

Liquid Mixtures ◽

Droplet Evaporation ◽

Distribution Functions ◽

Homogeneous Groups ◽

Novel Approach ◽

Proposed Model ◽

Complex Liquid

A finite diffusion droplet evaporation model for complex liquid mixture composed of different homogeneous groups is presented in this paper. Separate distribution functions are used to describe the composition of each homogeneous group in the mixture. Only a few parameters are required to describe the mixture. Quasi-steady assumption is applied in the determination of evaporation rates and heat flux to the droplet, and the effects of surface regression, finite diffusion and preferential vaporization of the mixture are included in the liquid phase equations using an effective properties approach. A novel approach was used to reduce the transport equations for the liquid phase to a set of ordinary differential equations. The proposed model is capable in capturing the vaporization characteristics of complex liquid mixtures.