关键词: 燃气轮机, 燃烧室, 一维网络, 流量分配, 燃烧

Abstract:

A gas turbine combustor is modeled and designed using 1-D network method, and the result is validated compared with the result of 3-D numerical simulation. The network method divides the combustor into a series of 1-D sub-flows, the 1-D network is solved with pressure equations and the sub-flows are linked together in the overall governing equations to obtain a complete solution of the entire flow field. In this way, pressure-drops and flow-splits may be obtained throughout the region of interest. A 1-D network is applied to model and optimize the specific combustor with targets include mass flow split of primary holes and cooling holes and the total pressure drop which is equal to 4.2%. Finally, numerical simulation of this new combustor is carried out and the results are compared with 1-D network, indicating that the targets are achieved well. Results of 1-D network match well with those of numerical simulation, demonstrating the accuracy and reliability of 1-D network approach in the design of complex combustors.

Key words: gas turbine, combustor, 1-D network, flow split, combustion