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以定常喷气下的多维压气机系统模型为基础,考虑引入非定常喷气带来的质量和动量效应,建立了非定常喷气下的多维压气机系统模型;分析了压气机主动稳定模态控制机理,并在上述模型基础上设计了非定常喷气下的模态控制律。以某压气机为例,在失速工况下,分别进行无喷气开环性能和非定常喷气下模态控制仿真。结果表明:与定常喷气模态控制相比,采用非定常喷气进行模态控制,流量仅为定常喷气的57%~80%,即可达到相同的控制效果,可有效减少喷气控制的流量,并且前4阶模态控制可以扩展压气机稳定工作范围达2.34%;控制模态越多,扩稳范围越大。
Based on the multi-dimensional compressor system model under constant jet, considering the mass and momentum effects brought by unsteady jet, a multi-dimensional compressor system model under unsteady jet was established. The control principle of the active mode of the compressor was analyzed. Based on the above model, the modal control law under unsteady jet is designed. Take a compressor as an example, under stalling conditions, the simulation of modal control under no-blow open-loop and unsteady blow-up is performed respectively. The results show that compared with the steady jet mode control, the unsteady jet mode control is used, the flow rate is only 57% ~ 80% of the constant jet, which can achieve the same control effect, which can effectively reduce the jet control flow rate, and The first 4 modes of modal control can expand the stable operating range of the compressor up to 2.34%. The more control modes, the larger the range of expansion.