| Citation: | XU Quanyong, WU Feng. Power balancing method in aero-engine whole-engine performance simulation[J]. Journal of Aerospace Power, 2022, 37（12）：2707-2718 doi: 10.13224/j.cnki.jasp.20210194
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A calculation method of power balance in CFD 3D machine simulation was presented. The key variables determining the equilibrium relationship such as temperature before turbine and physical speed were deduced and determined. The numerical iterative method based on the steady state flow field and power empirical relationship was proposed to realize the power balance. The power balance calculation method was used to carry out the CFD numerical calculation of the MTJ-80 turbojet, and the coupling and prediction of the performance simulation and control law were realized. Under the condition of constant fuel quantity, the power difference between compressor and turbine can be less than 0.1% through speed iteration, and the steady running speed can be predicted under the condition of fixed fuel supply. Under the condition of constant control speed, the power difference between compressor and turbine was less than 0.15% by adjusting the fuel quantity, and the fuel flow rate under the condition of constant control speed can be predicted. The data verification results showed that the proposed method can be coupled with CFD 3D machine calculation with strong convergence, which solved the power imbalance problem in the previous 3D performance simulation of the machine.
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