CAJ | 학술논문

提出了一种将皱褶芯材夹层板与主动冷却相结合的承载-热防护一体化结构形式。以煤油为冷却液，在强迫对流条件下，采用数值仿真方法对V-型和M-型皱褶芯材夹层板的热力响应进行了研究。首先，建立了主动冷却皱褶芯材夹层板的三维流固耦合模型，应用共轭传热数值计算方法，求解获得了冷却液和结构的温度场；采用顺序耦合求解，得到了相应的结构应力场和变形场。结果表明，实施主动冷却后皱褶结构的换热性能明显提高；沿流向温度上升，并呈现周期性波动；结构的皱褶在加强对流换热的同时，也导致了应力集中。芯材胞元拓扑构型及几何尺寸对结构的换热性能和应力应变具有一定程度的影响。与V-型相比，M-型皱褶结构的应力集中现象得到了较大缓解。
제출료일충장추습심재협층판여주동냉각상결합적승재-열방호일체화결구형식。이매유위냉각액，재강박대류조건하，채용수치방진방법대V-형화M-형추습심재협층판적열력향응진행료연구。수선，건립료주동냉각추습심재협층판적삼유류고우합모형，응용공액전열수치계산방법，구해획득료냉각액화결구적온도장；채용순서우합구해，득도료상응적결구응력장화변형장。결과표명，실시주동냉각후추습결구적환열성능명현제고；연류향온도상승，병정현주기성파동；결구적추습재가강대류환열적동시，야도치료응력집중。심재포원탁복구형급궤하척촌대결구적환열성능화응력응변구유일정정도적영향。여V-형상비，M-형추습결구적응력집중현상득도료교대완해。
A multifunctional sandwich panel with folded cellular cores was proposed for actively cooled load-bearing components in aerospace thermal protection systems. Thermal-mechanical responses of V-type and M-type folded core sandwich panels subjected to forced convection using kerosene as a coolant were studied numerically. First, a 3D fluid-solid coupling model was established and the temperature fields of fluid and structure were computed using the conjugate heat transfer model. Subsequently, the thermal stress and deformation of structure were obtained via sequential coupling method. The results show that the heat transfer perform-ances of folded core sandwich panels are evidently improved through active cooling. The temperature increases along the flow direc-tion and presents a periodic fluctuation. Heat convection is reinforced due to the folds which also cause serious stress concentrations. Cell topology and geometric dimensions have certain influences on the heat transfer characteristics and thermal structural behavior of the active cooled panels. A M-type folded core sandwich panel is superior to a V-type one for a much less severe stress concentra-tion.