An Investigation of Gas Turbine Combustors with High Inlet Air Temperatures. Part 2; Heat Transfer


Book Description

The wall temperature distribution of a combustion chamber is a function of the various heat transfer processes existing in the chamber and annulus. The basic turbulent conservation equations of mass, momentum, species, and energy are developed in an effort to provide an analytical rather than empirical method of determining the temperature distribution. However, the inclusion of radiation energy exchange using the radiative transport theory and the fact that the chamber flow is not one dimensional makes a closed form solution to the problem mathematically impossible.




An Investigation of Gas Turbine Combustors with High Inlet Air Temperatures. Part 3: Experimental Developments


Book Description

Current gas turbine combustor design philosophy must reflect consideration of both emission control and high inlet air temperature effects on flame stability, combustor performance, and flame tube life. An experimental facility has been designed for the detailed, systematic study of gas turbine combustion as a function of realistic inlet parameters. In an attempt to provide fundamental gas turbine measurements are described. In addition to a detailed description of the experimental facility, internal gas temperature and gas sampling probing techniques, facility instrumentation, and future engine parameter settings are discussed.




An Investigation of Gas Turbine Combustors with High Inlet Air Temperatures. Part I: Combustor Modelling


Book Description

An analytical model has been developed which will predict the performance and pollutant emissions of gas turbine combustors. The entire gas turbine combustor is approximated as a collection of perfectly stirred zones. Within each zone a general hydrocarbon combustion mechanism is used to predict the gas composition and temperature. The zone volumes and sizes are assigned from consideration of the theoretically predicted gas flows thereby approximating the mixing behavior of the system. Selected predictions of the overall model for a 'typical' aircraft combustor are presented. These results are seen to be qualitatively accurate and fall in the range of values typically observed in practical systems.




Combustion and Heat Transfer in Gas Turbine Systems


Book Description

Combustion and Heat Transfer in Gas Turbine Systems is a compilation of papers from the Proceedings of an International Propulsion Symposium held at the College of Aeronautics, Cranfield in April 1969. This compilation deals with research done by academic and scientific institutions and of industrial organizations, with some research papers covering atomization, fuels, and high-temperature materials. One paper describes the combustion system of the Concorde engine used in commercial flights, temperature of metal parts, and some design modifications to increase the mechanical life of the combustion system. Another paper discusses the evolution of the RB 162 combustion system that is used in the vertical takeoff and landing aircrafts. The RB 162 has many design features of the earlier single reversal chamber and differs in only one or two points. The book then notes the necessity of a plenum chamber burning to further development of supersonic engines and flight. One paper also proposes an alternative theory to the traditional ignition theory of altitude relighting such as those developed by Lewis and von Elbe. Another paper reposts on some observations made of the atomizing characteristics of air-blast atomizers and proposes simple changes to improve the performance of the atomizer by prefilming and allowing air to both sides of the fuel. This compilation will prove very helpful for aeronautical engineers, aviation designers, physicists, students of engineering, and readers who are interested in the design and development of jet engines and supersonic aircrafts.













NASA Technical Paper


Book Description