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为揭示进口热斑在1+1/2(无低压导叶)对转涡轮高压级中迁移的控制因素,运用三维非定常黏性流场计算程序对某1+1/2对转涡轮模型级在有无进口热斑条件下的流场进行数值模拟.结果表明,在进口总压分布相同的条件下,同无进口热斑的工况相比较,进口热斑的引入基本不会对高压涡轮的负荷产生影响,高压涡轮的负荷与进口压力分布直接相关;热斑在高压导叶中未发生周向和展向迁移;热斑在高压动叶中的迁移扩散路径主要由冷热流体在高压动叶入口处的周向气流角、二次流及浮力等3种因素控制.
In order to reveal the control factors for the migration of imported hot spot in 1 + 1/2 (without low pressure guide vanes) to the high pressure stage of turbomachinery, a three-dimensional unsteady viscous flow field calculation program was used to simulate the 1 + 1/2 counter- The results show that under the condition of the same total inlet pressure distribution, compared with the condition without imported hot spot, the introduction of imported hot spot will not affect the high pressure turbine The load of the high-pressure turbine is directly related to the distribution of inlet pressure. The hot spots do not migrate in the circumferential direction and the forward direction in the high-pressure guide vane. The migration and diffusion path of the hot spots in the high- The rotor blade inlet at the air flow angle, secondary flow and buoyancy control of three kinds of factors.