热力循环计算是燃气轮机性能分析和设计的重要手段.随着燃气轮机热力循环参数不断提高,热力循环计算必须要能对变工况下透平冷气需求量作出准确的估计,并考虑冷气在燃气轮机循环各环节的影响.本文基于适用于多轴燃气轮机热力循环计算模型,引入混合模型,结合气体掺混的Hartsel模型,建立了带冷却模型的热力循环计算模型.对某三轴MW级燃气轮机的变工况性能进行计算,通过与简化冷却模型的计算结果及实验数据的比较、分析,表明考虑混合模型的热力循环计算结果与实验数据具有更好的一致性.
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