Heat Transfer in Cooling Channels Near Trailing Edges of GasTurbine Blades

燃气轮机叶片后缘附近冷却通道中的传热

• 批准号: 8713833
• 负责人: S. Lau
• 金额: $ 7.11万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-09-01 至 1990-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8713833&HistoricalAwards=false
• 关键词: Heat; Transfer; Cooling; Channels; Near

To achieve high power plant efficiencies, the turbines in the plant must operate at the highest possible temperature. Present-day materials place a limit on these temperatures, so that cooling of the turbine blades is necessary to maintain their integrity in the face of the high temperature gases that pass through the turbine. One approach is to pass a coolant through flow passages situated within the blades. To further enhance the heat transfer within the passages, fins or ribs are used. The available information about the heat transfer characteristics of such finned or ribbed passages is insufficient for design. The experiments to be performed under the present proposal will remedy this deficiency. The heat transfer measurements will be supplemented by mass transfer measurements carried out by means of the naphthalene sublimation technique. The measured mass transfer coefficients will be converted to heat transfer coefficients via the analogy between the two processes. The obtained data will not only be useful for design but will also serve to verify numerical simulations.

为了实现发电厂的高效率，发电厂中的涡轮机必须 在尽可能高的温度下工作。 现代材料 对这些温度加以限制，使得涡轮机的冷却 刀片是必要的，以保持其完整性，在面对高 通过该涡轮机的温度气体。 一种方法是 使冷却剂通过位于叶片内的流动通道。 到 进一步增强通道、翅片或肋内的热传递， 采用 现有的资料有关的传热特性， 这种带翅片或肋的通道对于设计来说是不够的。 的 根据本建议进行的实验将纠正这一点 缺陷 热传递测量将由质量 通过萘进行的转移测量 升华技术 测得的传质系数为 通过两者之间的类比转换为传热系数 流程. 获得的数据不仅对设计有用， 也将用于验证数值模拟。