STUDY OF BURNING CHARACTERISTICS OF DIFFERENT FUELS AS APPLIED TO COMBUSTION CHAMBERS OF GAS TURBINE ENGINES

Abstract

The paper studies combustion characteristics of various fuels as applied to combustion chambers of gas turbine engines. A brief description of the reasons for switching to alternative fuels, the influence of the greenhouse effect, gases involved in the effect itself, and a plan for their control is given. The importance of combating nitrogen oxides and the reasons for tightening certification of jet engines are also presented. A brief description of the considered alternative fuels (methane, biogas, and hydrogen) is given, as well as the main reasons for their use, such as the advantages and disadvantages of combustion, ease of production, and impact on the environment. The main characteristics of alternative fuels (biogas, methane, hydrogen, methanol), such as laminar velocity, adiabatic combustion temperature, and combustion completeness are considered. The results of combustion temperature calculations are confirmed by data obtained using the CHEMKIN-Pro program. The laminar combustion velocity is determined by empirical dependencies obtained for different fuels. Based on the theory of turbulent combustion of a mixture by the "surface" mechanism, combustion completeness calculations are performed. The presented method of calculating combustion characteristics allows to obtain results in a simple and easy way and to get a primary picture of what combustion looks like at given parameters of pressure, temperature and height of vortex blades. Which further allows to use it in one-dimensional programs in order to avoid using large and complex algorithms and, thus, to speed up the process of obtaining results. It is also possible, using the obtained characteristics, to additionally calculate emissions of harmful gases, such as NOx emissions, using Zeldovich formulas