Market competitiveness for aero engine power plant dictates that improvements in engine performance and reliability are guaranteed a priori by manufacturers. The requirement to accurately predict the life of engine components makes exacting demands of the internal air system, which must provide effective cooling over the engine duty cycle with the minimum consumption of compressor section air. Tests have been conducted at the University of Sussex using a turbine test facility which comprises a two stage turbine with an individual stage pressure ratio of 1.7:1. Main annulus air is supplied by an adapted Rolls-Royce Dart compressor at up to 440 K and 4.8 kg s~(-1). Cooling flow rates ranging from 0.71 to 1.46 C_w ent, a disc entrainment parameter, have been used to allow ingress or egress dominated stator well flow conditions. The mechanical design of the test section allows internal cooling geometry to be rapidly re-configured, allowing the effect of jet momentum and coolant trajectory to be investigated. An important facet to this investigation is the use of CFD to model and analyse the flow structures associated with the cavity conditions tested, as well as to inform the design of cooling path geometry. This paper reports on the effectiveness of stator well coolant flow rate and delivery configurations using experimental data and also CFD analysis to better quantify the effect of stator well flow distribution on component temperatures.
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机译：Aero发动机发电厂的市场竞争力决定了发动机性能和可靠性的提高得到了制造商的先验。准确预测发动机部件的寿命的要求使内部空气系统的要求进行了严格的要求，该内部空气系统必须在发动机占空比上提供有效的压缩机占空比空气消耗。使用涡轮机测试设施在Sussex大学进行测试，该机构包括一个具有1.7：1的单个阶段压力比的两个阶段涡轮机。主环状空气由适应的轧辊 - 罗伊斯飞镖压缩机提供，高达440 k和4.8 kg s〜（-1）。冷却流量范围为0.71至1.46 C_W ENT，圆盘夹带参数，已被用于允许入口或出口主导的定子井流量条件。测试部分的机械设计允许迅速重新配置内部冷却几何形状，从而允许研究喷射动量和冷却剂轨迹的效果。本研究的重要方面是使用CFD来模拟和分析测试相关的流动结构，以及通知冷却路径几何形状的设计。本文通过实验数据报告定子井冷却剂流量和输送配置的有效性，以及CFD分析，以更好地量化定子井流量分布对元件温度的影响。
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