METHOD AND APPARATUS FOR DETERMINING THE THERMAL PERFORMANCE OF ACTIVELY COOLED TURBINE COMPONENTS

摘要

The internal fluid passage of a component is supplied with a fluid at a first temperature until the component reaches a first steady thermal state (60). The internal fluid pressure and internal and external fluid temperature and flow rate are measured and recorded (61). Next, the internal fluid passage of the component is supplied with a fluid at a second temperature until the component reaches a second steady thermal state (62). The exterior surface temperature, time between first and second steady thermal state, and internal and external fluid temperature and flow rate are measured and recorded (63). Then, the distance between the internal surface and the corresponding external surface, and heat capacity, density, and thermal conductivity of the material comprising the component are provided (64). Based on these data provided, the heat transfer coefficient of the internal surface of the internal fluid passage is calculated (65). The internal heat transfer of the internal surface of the internal fluid passage is compared with the corresponding external heat transfer of the exterior surface of the component (66). If the internal heat transfer of the internal surface does not equal the external heat transfer of the exterior surface, the internal fluid passage is redesigned (68). After redesign, the thermal performance of the component is re-evaluated by repeating the earlier described process or portions thereof.