以某成熟燃气轮机为原型，针对80 MW等级小F重型燃气轮机提出了两种放风优化方案。用定常三维/一维数值方法，分别模拟了原型设计和两种优化方案的燃气轮机启动过程，分析了放风量对压气机气动稳定性的影响，并以压气机失速裕度进一步评估了两种优化方案的可靠性。结果表明：随着压气机中间级放风量的增大，启动过程低转速阶段压气机气动稳定性增强，高转速阶段压气机气动稳定性降低；相较而言，压气机中间级放风量小的优化方案更能兼顾低、高转速的稳定运行，最终选择采用该方案作为80 MW等级小F重型燃气轮机的放风优化方案。

Using a mature gas turbine as a prototype,two blowoff optimized design schemes were proposed for 80 MW small F class heavyduty gas turbine.By the numerical method of steady threedimension/onedimension,the startup process of gas turbine was simulated respectively for the prototype design and two optimized design schemes. The influence of the blowoff volume on the aerodynamic stability of the compressor was analyzed,moreover,the reliability of the two optimized design schemes was further evaluated by the compressor stall margin. The research result shows that with the increase of the blowoff volume of the middle stages of the compressor,the aerodynamic stability of the compressor at the lowspeed stage during the startup process is enhanced,while the aerodynamic stability of the compressor at the highspeed stage is reduced. In comparison,the optimized scheme with blowoff volume at the intermediate stage of compressor has better balance of the stable operation at high and low speeds,which is chosen as the blowoff optimized design scheme of 80 MW small F class heavyduty gas turbine finally.

TH123，TK72