刚性陶瓷瓦隔热响应特性及接触热阻试验研究

Experimental Study of Thermal Insulation Response Characteristics and Thermal Contact Resistance Between Rigid Ceramic Tile and Stainless Steel

陶瓷材料以其耐高温、耐磨损、隔热效果好的特点,在燃气轮机中有着广阔的应用前景。由于陶瓷材料较脆,单独承载能力有限,通常需要与金属材料结合使用,以满足零部件的结构强度设计要求。采用试验测量方法,研究了ZrO_(2)刚性陶瓷瓦的隔热效果响应特性,并测量了ZrO_(2)刚性陶瓷瓦与304L不锈钢板在不同热负荷和界面应力条件下的接触热阻。研究结果表明,ZrO_(2)刚性陶瓷瓦具有良好的隔热效果。在工程应用中,需考虑其非稳态导热特性,才可更准确地评估其隔热性能。随着热负荷和界面应力的增大,刚性陶瓷瓦与不锈钢板的接触热阻逐渐降低,但变化幅度逐渐减小。研究成果可为基于刚性陶瓷瓦的热防护设计和工程应用提供参考。

Due to high temperature resistance,wear resistance and good heat insulation effect,ceramics materials have broad application prospects in gas turbine.Because of the brittleness and limited strength capacity of ceramic materials,it is usually necessary to combine ceramic with metal materials to meet the structural strength design requirements of parts.The thermal barrier response characteristics of the rigid ceramic tile are studied by experimental method,and the thermal contact resistance between the ZrO_(2) rigid ceramic tile and 304L stainless steel sheet is measured under different heat load and interface stress conditions.The study shows that the ZrO_(2) rigid ceramic tile has good thermal insulation effect.However,the unsteady state heat transfer characteristics should be considered to accurately evaluate its thermal insulation performance in actual engineering application.As the heat load and interface stress increased,the thermal contact resistance between rigid ceramic tile and stainless steel sheet decreases gradually,with the variation range decreases gradually.The study could provide reference for thermal protection design and engineering application based on the rigid ceramic tile.