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Influences of energy management strategy on stress state of near real geometry of turbine disk

机译：能量管理策略对涡轮盘近实几何应力状态的影响

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From the point of view of the physical essence, using cooling technology in turbine systems is a process of energy management and the developed cooling structure in the last forty years is aimed at carrying out a different energy management strategy. Based on this idea, in this paper the energy management strategy for each cooling structure was abstracted first and reflected by parameters of heating energy Q_e in the outer surface, exchanged energy Q_(in) in the inner surface and wall heat transfer coefficient h of the disk. Then, the influences of energy management strategy on stress state of near real geometry of the turbine disk were investigated. That is, the equation correlating different energy management strategies with stress states for disks was built by theoretical analysis and the computational fluid dynamics and finite element simulations were applied to validate the theoretical analysis. Results showed that the stress state could be effectively controlled through actively adjusting the energy management strategy. And under a constant cooling structure and equal consumption of cooling air and heating energy conditions, the heating energy of disks could be rearranged (reflected by allocation ratio of heating energy Φ) in outer (Q_e) and inner (Q_(in)) surface to achieve the actively heated hub of the disk, and the resulting decline ratio of maximum equivalent stress level in hub could be arrived 45.52% at Φ = 0.20 to compare with the conventional energy management strategy (Φ = 0), even in 3981 rpm. The reason for the preceding effect was explained by an artificial V-shaped temperature distribution that was established in the disk through actively rearranging the heating energy and correspondingly, the reverse temperature gradient between the hub and web produced a pulling effect and counteracted parts of the stress from rotating. In general, the simulation data were in strong agreement with the above results.
机译：从物理本质的角度来看，在涡轮机系统中使用冷却技术是能源管理的过程，最近四十年来开发的冷却结构旨在执行不同的能源管理策略。基于这一思想，本文首先对每种冷却结构的能量管理策略进行了抽象，并通过外表面加热能Q_e，内表面交换能Q_（in）和壁的壁传热系数h来反映。磁盘。然后，研究了能量管理策略对涡轮盘近乎真实几何形状的应力状态的影响。也就是说，通过理论分析建立了将不同的能量管理策略与磁盘的应力状态相关联的方程，并通过计算流体动力学和有限元模拟来验证理论分析。结果表明，通过积极调整能源管理策略可以有效地控制压力状态。并且在恒定的冷却结构和相等的冷却空气消耗量以及热能条件下，磁盘的热能可以在外表面（Q_e）和内表面（Q_（in））重新排列（由热能Φ的分配比反映）。达到主动加热的磁盘轮毂，即使在3981 rpm的情况下，与传统的能量管理策略（Φ= 0）相比，在Φ= 0.20时，轮毂中最大等效应力水平的下降比也可以达到45.52％。产生上述效果的原因是通过主动重新安排加热能量在磁盘上建立的人造V形温度分布来解释的，相应地，轮毂和腹板之间的反向温度梯度产生了拉力效应，并且抵消了部分应力从旋转。总的来说，仿真数据与以上结果非常吻合。

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