Numerical simulation results for the unsteady thermal and stressed states of a nozzle vane under unsteady operation conditions of the gas turbine are presented. The vane and nozzle block duct 3D computer model was constructed. The finite element mesh form, its sizes, and calculation time steps were optimized. The vane and duct contained 1.7 and 3.6 mln elements and 2.3 and 0.8 mln nodes, respectively. The mesh smoothing with corresponding nodal displacement near the transition zones and in the vicinity of curvilinear surfaces was used. The simulation consisted in successive numerical solutions of nonstationary flow problems for a moving medium and heat, transfer, thermal conductivity, and thermoelasticity problems for the vane. The parameters of unsteady thermal loading conditions were defined. The thermal properties of the moving medium and vane material were assumed to be time-dependent. For turbine power improvement conditions, time variations of duct flow parameters, temperatures, thermal stresses in different vane zones, their gradients and rates were analyzed. The essential nonuniformity of the thermostressed vane state and zones of thermal stresses, almost reaching the ultimate strength of the material, were noted. The effect of general heat flow components on the disturbance of thermal stresses was shown. Emphasis was placed upon the appearance of tensile stresses on a heated trailing edge of the vane (most critical zone). The conclusion was drawn regarding a potential application of a MAX phase Ti2ALC us a structural material for the vanes of short-life gas turbines.

给出了在燃气轮机非稳态运行条件下喷嘴叶片非稳态热应力状态的数值模拟结果。构建了叶片和喷嘴块风道3D计算机模型。优化了有限元网格的形式，大小和计算时间步长。叶片和风管分别包含1.7和360万个元素以及2.3和80万个节点。在过渡区域附近和曲线表面附近使用具有相应节点位移的网格平滑。该模拟包括连续的数值解，该数值解针对运动介质的非平稳流动问题以及叶片的热，传递，导热性和热弹性问题。定义了非稳态热负荷条件的参数。假定移动介质和叶片材料的热性能与时间有关。对于涡轮功率改善条件，分析了不同叶片区域中的管道流量参数，温度，热应力，其梯度和速率的时间变化。指出了热应力叶片状态和热应力区域的基本不均匀性，几乎达到了材料的极限强度。显示了一般热流分量对热应力干扰的影响。重点放在叶片加热后缘（最关键区域）上出现拉应力。得出的结论是，MAX相Ti2ALC的潜在应用是一种用于短寿命燃气轮机叶片的结构材料。对于涡轮功率改善条件，分析了不同叶片区域中的管道流量参数，温度，热应力，其梯度和速率的时间变化。指出了热应力叶片状态和热应力区域的基本不均匀性，几乎达到了材料的极限强度。显示了一般热流分量对热应力干扰的影响。重点放在叶片加热后缘（最关键区域）上出现拉应力。得出的结论是，MAX相Ti2ALC的潜在应用是一种用于短寿命燃气轮机叶片的结构材料。对于涡轮功率改善条件，分析了不同叶片区域中的管道流量参数，温度，热应力，其梯度和速率的时间变化。指出了热应力叶片状态和热应力区域的基本不均匀性，几乎达到了材料的极限强度。显示了一般热流分量对热应力干扰的影响。重点放在叶片加热后缘（最关键区域）上出现拉应力。得出的结论是，MAX相Ti2ALC的潜在应用是一种用于短寿命燃气轮机叶片的结构材料。指出了热应力叶片状态和热应力区域的基本不均匀性，几乎达到了材料的极限强度。显示了一般热流分量对热应力干扰的影响。重点放在叶片加热后缘（最关键区域）上出现拉应力。得出的结论是，MAX相Ti2ALC的潜在应用是一种用于短寿命燃气轮机叶片的结构材料。指出了热应力叶片状态和热应力区域的基本不均匀性，几乎达到了材料的极限强度。显示了一般热流分量对热应力干扰的影响。重点放在叶片加热后缘（最关键区域）上出现拉应力。得出的结论是，MAX相Ti2ALC的潜在应用是一种用于短寿命燃气轮机叶片的结构材料。重点放在叶片加热后缘（最关键区域）上出现拉应力。得出的结论是，MAX相Ti2ALC的潜在应用是一种用于短寿命燃气轮机叶片的结构材料。重点放在叶片加热后缘（最关键区域）上出现拉应力。得出的结论是，MAX相Ti2ALC的潜在应用是一种用于短寿命燃气轮机叶片的结构材料。