International Conference on Mechanical, Industrial and Energy Engineering 2014 26-27 December, 2014, Khulna, BANGLADESH * Corresponding author. Tel.: +88-01747890428 E-mail address: mahabub.me.kuet@gmail.com ICMIEE-PI-140107 DESIGN & ANALYSIS OF A MODEL COMBUSTION CHAMBER OF GAS TURBINE Samsul Arfin Mahmood 1 , Mahabub Hasan 2 *, Md. Siddiqur Rahman 3 Department of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna-9203, BANGLADESH ABSTRACT Development of a country is assessed by it’s power consumed per capital. Gas turbine is highly dependable power generating source in every country. As a developing country Bangladesh needs a huge amount of power. To keep pace with the other developed countries and their technologies, it is customary to have a great amount of power generating sources. Gas turbine can easily serve this purpose. For fulfilling this purpose our present effort is to design & analysis of a combustion chamber which is a vital part of gas turbine. This paper summarizes the design and analysis of gas turbine combustion chamber.3D model of the combustion chamber is generated & finite element method is used for meshing and applying boundary conditions for static and thermal analysis. Here we have done the study on different materials which are suitable for improvement of combustion chamber. This paper also validates the design using available alloys. Any development regarding this project will be accepted based on it’s validity. Keywords: Design ; Combustion chamber ; Analysis ; F.E method. 1.0 Introduction A combustion chamber is an enclosure in which combustion takes place just like burning of fuel & oxidant. It is the 2 nd subsequent part of a gas turbine. It is also known as burner, flame holder or combustor. High pressure air or gas comes from compression system and enter into the combustion chamber. The combustion chamber then heats this air at constant pressure. After heating, air passes from the combustion chamber through the nozzle guide vanes to the turbine. At constant pressure, a high temperature is produce which is sustained by combustor wall. So it is necessary to design a combustion chamber with appropriate temperature sustainable metal. In spite of having different available metal, it is difficult to find out proper one. The ability to heat consume depends on the yield strength of metal. This property changes metal to metal according to their molecular arrangement, impurities or other containing ingredient. But it is not possible to find out these properties one by one in real life. For this reason there arise the topics of simulation for different metal which will be used to construct a combustor. There are different methods of analysis of metal properties. From all of those finite element method is considered as perfect and less time consuming method. It is a numerical method for finding approximate solution of boundary value problems. For a combustion chamber, inlet pressure, temperature are known value just like initial condition and there also exist a boundary condition. So applying this conditions and other affecting parameter, the internal heat generating environment and condition of combustor wall are easily determined by the iteration of F.E.M. According to design criteria and simulation result, some metals are selected. Among them, most reliable and financially less consuming metal is find out to use as a combustor outer wall & components. All recent research allow the procedure of construct a combustion chamber in this systematic way. But metal by metal analysis is uniqueness of this procedure which application can be more popular than before. 2.0 Finite Element Method The finite element method (FEM) rapidly grew as the most useful numerical analysis tool for engineers and applied mathematicians because of it natural benefits over prior approaches. The main advantages are that it can be applied to arbitrary shapes in any no of dimensions. The shape can be made of any number of materials. The material properties can be non-homogeneous. (depends on location) and/or anisotropic (depend on direction). The way that the shape is supported (also called fixtures or restraints) can be quite general, as can the applied sources (forces, pressures, heat flux, etc.). The FEM provides a standard process for converting governing energy principles or governing differential equations in to a system of matrix equations to be solved for an approximate solution. For linear problems such solutions can be very accurate and quickly obtained. Having obtained an approximate solution, the FEM provides additional standard procedures for fol -low up calculations (post-processing), such as determining the integral of the solution or its derivatives at various points in the shape .The post-processing also yields impressive color displays, or graphs, of the solution and it’s related information. Today, a second post-processing of the recovered derivatives can yield error estimates that show where the study needs improvement. Indeed, adaptive procedure allowed