The Research Of The Regenerator And Exhaust Volute In The Marine ICR Gas Turbine

Using complex cycle technology is one important way to improve the gasturbine's capability. Based on a high power simple cycle Marine Gas Turbine(MGT) , the possibility of reconstructing it to become the IntercooledRecuperated Cycle Gas Turbine was analyzed in the thesis, and then, severalproblems involved in the design process were pointed out.The design of regenerator requires that not only the higher recuperated effectiveness and the lower loss of pressure can be kept, but also the dimension parameters of the regenerator can be minimized to fix conveniently. The design of exhaust volute needs to make air flow uniformly before it enter the inlets of the regenerator, so airflow can keep balance in every tunnel of regenerator.Based on the thermal parameters of MGT, a cycle analysis of ICR was conducted. By discussing every factor that can influence the cycle and contrasting with the simple cycle, ICR was proved better than the simple cycle at power and efficiency. The operations and characteristics of the regenerator which was in the ICR were discussed. And the regenerator's characteristics and requests were regard as premise, the plate-fin heat exchanger was choosed as the form of the regenerator from many compact heat exchangers. By choosing normative fins and doing thermodynamic calculation based on the inlet condition, the dimension parameters of the regenerator were confirmed to attain the proper project of minimizing volume.The performance of the regenerator has a direct relationship with the uniformity of its internal flow field, so a reasonable exhaust volute needs to be designed to guarantee the uiniform of its inlet flow field. So in this thesis, several projects of exhaust volute's math models were established and by using fluid software, the liquidity in exhaust volute was simulated. And then, comparing with practical parameters, the optimization of projects was comfirmed.