A Non-Dimensional Consideration in Combustor Axial Stress Computations

作     者：Ebene Ufot Barinaadaa Thaddeus Lebele-Alawa Ibiba Emmanuel Douglas Kelvin D. H. Bob-Manuel 

作者机构：Faculty of Engineering Rivers State University of Science and Technology Department of Mechanical Engineering University of Uyo 

出 版 物：《Engineering（科研）》 (工程（英文）（1947-3931）)

年 卷 期：2010年第2卷第9期

页      面：733-739页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Thermal Stresses Combustor Gas-Turbine 

摘      要：Thermal stresses in the combustor of gas-turbines are computed using non-dimensional parameters. Buckingham pi theorem was used to arrange the listed relevant parameters into non-dimensional groups. In testing the validity of the functional relation of the non-dimensional independent parameters, use is made of the prevailing temperatures of the combustor in operation. A computer program was used to enhance computations. The results showed an interesting way of influencing the axial stresses. To reduce stresses in gas-turbine combustors, a method of varying the independent parameter that is of radius ratio oriented and thickness dependent was adopted. This showed a reduction of the axial stresses to minimal levels using the parameters. Plots were made and a point of inflection that manifested itself in the presentation of the axial stress function was further investigated upon. It turned out to be a point of abnormal stress level and out-of-trend temperature profile. The use of non-dimensional consideration proved adequate in the computation of axial stresses. The results showed a 2 percent difference from existing values of stresses got from a transient thermal loading of a combustor.