Thermodynamic and transport properties have been calculated for air, the combustion products of natural gas and air, and combustion products of ASTM-A-1 jet fuel and air. Properties calculated include: ratio of specific heats, molecular weight, viscosity, specific heat, thermal conductivity, Prandtl number, and enthalpy

Poferl, D. J.

Svehla, R. A.

English

NASA Technical Reports Server

Ma1ch 1975	 B75-10004 
• .
	
NASA TECH BRIEF 
Lewis Research Center 
NASA Tech Briefs announce new technology derived from the U.S. space pro g ram. They are issued to encourage 
commercial application. Tech Briefs are available on a subscription basis from the National Technical Information 
Service. Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Office, NASA, Code KT. Washington, D.C. 20546. 
Properties of Air and Combustion 
Products of Fuel with Air 
.
Thermodynamic and transport properties have been 
calculated for air, the combustion products of natural gas 
and air, and the combustion products of ASTM-A-1 jet 
fuel and air. Properties calculated include: ratio of specific 
heats, molecular weight, viscosity, specific heat, thermal 
conductivity, Prandtl number, and enthalpy. These prop-
erties have been calculated for temperatures from 300 to 
2800 K (80 to 4580°F) in 100 K (180°F) increments at 
pressures of 20, 30 and 40 atmospheres. The data for 
natural gas and ASTM-A-1 were calculated for fuel-air 
ratios from 0.01 to stoichiometric in 0.01 increments. The 
data are presented in the referenced report. 
The calculated property data in the report are for the 
combustion products of defined fuels. However, it is 
estimated that the difference between calculated thermo-
dynamic and transport properties of the combustion 
products of ASTM-A-1 burned in air and the properties of 
any of the typical JP fuels burned in air will be less than 
0.5 percent for . the same equivalence ratio. Likewise, 
errors of less than 0.5 percent will be introduced if the 
thermodynamic and transport properties of the combus-
tion products of natural gas are used for the properties of 
the combustion products of methane or any natural gas 
composition. 
The analytical investigation described was conducted 
to determine properties for the gas compositions, pres-
sures, and temperatures encountered in current and 
projected jet engine cooling studies. Accurate values of 
the thermodynamic and transport properties are not 
available in the literature over the required range of 
pressure and temperature. These property data are re-
quired for designing jet cooling configurations for com-
bustor liners and turbine vanes, blades, and end walls. 
The data should be useful for generation applications 
in gas turbines and for a variety of industrial combustion 
processes.
Notes: 
1. Further information is available in the following 
report: 
NASA TN-D-7488 (N74-12575), Thermodynamic 
and Transport Properties of Air and Its Products of 
Combustion with ASTM-A-1 Fuel and Natural Gas 
at 20, 30 and 40 Atmospheres 
Copies may be obtained at cost from: 
Aerospace Research Applications Center 
Indiana University 
400 East Seventh Street 
Bloomington, Indiana 47401 
Telephone: 812-337-7833 
Reference: B75-10004 
2. Previously calculated properties of the same kind for 
pressures of 3 to 10 atmospheres, announced in Tech 
Brief 69-10711, are available in the following report: 
NASA TN-D-5452 (N69-37936), Thermodynamic 
and Transport Properties of Air and the Combus-
tion Products of Natural Gas and ASTM-A-1 with 
Air 
Copies may be obtained at cost from the Aerospace 
Research Applications Center at the address above. 
3. Specific technical questions may be directed to: 
Technology Utilization Officer 
Lewis Research Center 
21000 Brookpark Road 
Cleveland, Ohio 44135 
Reference: B75-10004 
Patent Status: 
NASA has decided not to apply for a patent. 
Source: D.J. Poferl and R. Svehla

Lewis Research Center
(LEW-1 2402) 
Category 03 
This document was prepared under the sponsorship of the National 	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States 	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States 	 will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19750000004 2020-03-19T19:59:31+00:00Z


Properties of air and combustion products of fuel with air

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