Optimal Design And Performance Analysis Of Heat Transfer For Gas Turbine Intercooler System

In recent years, the application of modified aero-engine in the non-aviation field has an important practical significance. The outstanding advantage of gas turbine ICR cycle is that it not only has the high thermal efficiency and power at design state, but also overcomes the poor economy at the low load compared with the simple cycle, for that reason, the ICR cycle is the advanced gas turbine cycle that is researched competitively. In the ICR cycle, gas turbine intercooler system with regenerator improves the gas turbine output power and reduces the gas turbine fuel consumption, so intercooler system is a very important component of ICR cycle. Optimal design and performance analysis of gas turbine intercooler system have an important practical significance.This thesis is aimed at optimizing design of intercooler system, and researching heat transfer performance of gas turbine intercooler system. So, main works of this thesis could be summarized as follows: Firstly, an overview of the development of ICR cycle, the necessity of studying ICR cycle and the status of researching ICR cycle at home and abroad is done. The advantages of ICR cycle are introduced and analyzed systematically.Secondly, the design of intercooler system is optimized. Design requirements of intercooler system are put forward, and gas turbine calculation procedure of assisting optimal design is developed. Based on the traditional design theory, the design method and procedure of marine gas turbine intercooler system are established. On this basis, the optimal design of marine gas turbine intercooler system is carried out in this paper.Thirdly, the intercooler system performances are analyzed. The overall intercooler system design process is developed,by this process, taking the intercooler system of a medium-sized gas turbine for example, optimal design is done, and, flow parameters performance and off-design state performance are analyzed. The intercooler system performances of two kinds of straight fin and serrated fin structure are compared, moreover,relationships between the structure parameters and intercooler system performance are given.Finally, influence with condensation of water in air on intercooler system performance is studied. The relation with relative humidity of low-pressure compressor inlet and outlet is analyzed. On this basis, this paper emphasize on the researches of the process of water condensation in intercooler and the influence with condensate on heat exchange performance of intercooler system.The results of this paper could be a guide for the optimal design of marine gas turbine intercooler system.