连续式跨声速风洞动力系统运行安全研究

为提高连续式跨声速风洞动力系统的运行安全性，结合0.6 m×0.6 m连续式跨声速风洞的建设、调试和运行实践，分析风洞闭口回流布局对气流温升和管网阻力的影响，研究轴流压缩机在风洞应用中的轴系、运行工况和马赫数控制的安全特性，对关键性能进行了测试研究。研究结果表明：换热器性能满足压缩机运行和风洞总温需求；得到了压缩机轴系运行参数报警阈值和防喘振曲线设置的依据，测试出了扭转振动临界转速。压缩机防喘振曲线统一采用100 kPa总压下的流量和压力比，风洞马赫数可采用压缩机转速和中心体位置闭环组合控制。

Research on Operational Safety of Driving System of Continuous Transonic Wind Tunnel

In order to enhance the operational safety of driving system in continuous transonic wind tunnel, the effects of closed-circuit configuration on airflow temperature rise and wind tunnel tube pressure loss is analyzed based on construction, debugging and operation of 0.6 m×0.6 m continuous transonic wind tunnel. The safety features of shafting, surge and Mach number control for axial compressor used in wind tunnel are researched. The test results show that the performance of heat exchanger meets the requirement of axial compressor operation and total temperature in wind tunnel. The experimental basis of operation parameter alarm threshold values of axial compressor shafting and setting of anti-surge curves is achieved, and the critical speeds of torsional vibration are measured. The flow rate and pressure ratio at 100 kPa total pressure are used for the anti-surge curves of axial compressor, and Mach number can be controlled by the rotational speed of axial compressor and the position of mechanical central part.