The air flow distribution in a designed single tube combustor (for 100kW ground gas turbine) was experimentally investigated. Under the atmospheric pressure condition

the flow distribution characteristics of the swirlers

primary holes and dilution holes were experimentally obtained using hole plugging method separately

and the discharge coefficients for different structures were analyzed based on the experimental data. Then the flow distribution and total pressure loss of the single tube combustor were studied under different inlet air flows. Results showed that the air flow distributions of different structures were stable when the inlet air flow varied

and agreed very well with the designed data. With the increase of the inlet air flow (inlet Reynolds number)

the discharge coefficients for swirlers

primary holes and dilution holes decreased slightly

but the total pressure loss increased gradually. The experimental results of primary holes and dilution holes by using two flow distribution experiment methods were slightly different but basically the same for the air distribution

therefore

the two different experiment methods were reliable. The experimental results can provide an optimization basis for the design of 100kW ground gas turbine single tube combustor.