Thermodynamic Properties of Stoichiometric Combustion Products

2021 ◽  
pp. 454-458
Keyword(s):  
Thermodynamic Properties ◽  
Combustion Products

A discussion on advanced methods of energy conversion- Magnetohydrodynamic power generation - Wave growth in m .h.d. generators

1967 ◽  
Vol 261 (1123) ◽  
pp. 461-470 ◽  
Keyword(s):  
Thermodynamic Properties ◽  
Acoustic Waves ◽  
Subsonic Flow ◽  
Flow Direction ◽  
Noble Gas ◽  
Travelling Waves ◽  
Combustion Products ◽  
Stationary Waves ◽  
Ohmic Dissipation ◽  
Steady Current

It has been shown that in an m.h.d. generator, acoustic waves can grow due to the coupling of fluctuations in electrical conductivity, Hall parameter and thermodynamic properties of the gas, with the ohmic dissipation and electromagnetic body forces. A new analysis of this phenomenon is presented in which waves travelling at an arbitrary angle to the flow direction in a plane perpendicular to the magnetic field are considered. In contrast to McCune’s (1964) treatment the thermodynamic properties are not restricted to perfect gas laws; and the condition for spatially and temporally growing waves is examined using a general dispersion relation which includes both these types of wave. We consider in detail (i) stationary waves in supersonic flow, and (ii) travelling waves in the subsonic flow found in the G.E.G.B. 200 MW thermal input generator being built at Marchwood, and a possible power station m.h.d. generator. It is found that the waves in the 200 MW rig which burns kerosene in oxygen will be damped. But in an oil-air combustion products generator for Hall parameters of order 3 or greater, it is found that stationary waves which grow rapidly may occur at Mach numbers greater than about 1-7; and in subsonic flow waves propagating antiparallel to the steady current vector may be amplified, though the growth rate is not excessive. In noble gas m.h.d. generators these waves are more unstable than in the oil, air combustion products generator.

An Approximate Method to Obtain Thermodynamic Gas Properties for Use in Gas Turbines

2014 ◽  
Author(s):  
N. A. Cumpsty ◽  
A. J. Marquis
Keyword(s):  
Thermodynamic Properties ◽  
Approximate Method ◽  
Gas Turbines ◽  
Combustion Products ◽  
Empirical Approach ◽  
Polynomial Approximations ◽  
Adequate Accuracy ◽  
Computer Based ◽  
Educational Course ◽  
Gas Properties

The calculation of the performance of gas turbines, turbochargers, compressors and turbines requires the thermodynamic properties of the gases. Tables of properties exist which are effectively exact, but using these tables is tedious and far from practical in computer-based calculations. Representing tabulated results with polynomial approximations is inconvenient and prone to error in implementation. For teaching and simple calculations simple approximations, such as γ = 1.4 for unburned air and γ = 1.3 for combustion products, are sometimes used, but this is far from wholly satisfactory. This paper describes and discusses a simple empirical approach which will give adequate accuracy for many purposes but is simple enough to be used as part of an educational course.

Thermodynamic properties of coal combustion products

2006 ◽  
Vol 53 (10) ◽  
pp. 842-847
Author(s):  
E. V. Samuilov ◽  
N. A. Sheveleva
Keyword(s):  
Thermodynamic Properties ◽  
Coal Combustion ◽  
Combustion Products ◽  
Coal Combustion Products

A discussion on advanced methods of energy conversion- Magnetohydrodynamic power generation - Composition and thermodynamic properties of combustion products of methane containing potassium carbonate

1967 ◽  
Vol 261 (1123) ◽  
pp. 486-489
Keyword(s):  
Power Generation ◽  
Thermodynamic Properties ◽  
Energy Conversion ◽  
Potassium Carbonate ◽  
Combustion Products ◽  
Considerable Effect ◽  
Different Temperatures ◽  
Concentration Of Electrons ◽  
Composition Of Combustion Products

The paper describes calculations and some computations of the composition of combustion products of methane and oxygen-enriched air between 1000 and 4000 °K. The effect of introducing potassium into the mixture is considered. This gives rise to the presence of electrons in large quantities and to certain redistributions in the proportions of some compounds and, at different temperatures, to the formation of a variety of potassium compounds. The formation of those compounds has a considerable effect on the concentration of electrons.

Thermodynamic properties of mixed fuel combustion products

2010 ◽  
Vol 53 (1) ◽  
pp. 117-119
Author(s):  
A. B. Shigapov ◽  
I. Yu. Silov ◽  
A. A. Shigapov
Keyword(s):  
Thermodynamic Properties ◽  
Combustion Products ◽  
Fuel Combustion ◽  
Mixed Fuel

Development of Tools for Thermodynamic Calculation of Rocket Engine Characteristics using the Julia Programming Language

2021 ◽  
pp. 80-93
Author(s):  
G.V. Belov
Keyword(s):  
Thermodynamic Properties ◽  
Cross Section ◽  
Process Model ◽  
Gas Flow ◽  
Rocket Engine ◽  
Combustion Products ◽  
Flow Speed ◽  
Critical Cross Section ◽  
Chemical Calculation ◽  
Product Flow

The experience in developing an algorithm and a program for the thermal-chemical calculation of the characteristics of a rocket engine is presented. The program is written in Julia. To calculate the equilibrium composition of combustion products the freely distributed library Ipopt is used. The program is interfaced to the database on thermodynamic properties of individual substances IVTANTERMO. For the convenience of processing, the information on thermodynamic properties is stored in two text files of a special form. The program has been developed using the simplest working process model according to which the flow is one-dimensional, the product flow is adiabatic, there are no friction losses, the product flow is equilibrium, and the speed of condensed particles is equal to the gas flow speed. Ratios for calculating the derivatives of composition, as well as equilibrium values of heat capacity and sound velocity are given. The text of the program can be used in the study process and can easily be adapted to more complex models of the rocket engine workflow. The calculation results obtained using the developed program are in good agreement with the results of TERRA calculations. The execution time of one calculation for a four-element fuel, which includes the determination of the combustion products characteristics in the chamber, the critical cross section and at the nozzle cross section, varies in the range of 3--5 s

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