基于气液共面的超薄均热板吸液芯结构制造及传热性能

针对5G时代轻薄电子器件散热空间极其受限的难题，开展高效热控器件气液共面超薄均热板（厚度≤0.2mm）的研究。为突破现有超薄均热板难以进一步超薄化的限制，项目提出新型气液共面结构，建立气液共面下工质流动与压降模型，揭示蒸汽与液体在运动过程中的相互影响机制；针对不同加工方法，实现丝网吸液芯微纳功能结构制造及表面形貌精确调控，提升吸液芯毛细性能并避免气液通道堵塞，揭示表面功能结构形貌参数对吸液芯相变传热的影响机制；开展超薄均热板传热性能实验与理论研究，建立吸液芯结构与均热板传热性能的关联模型，揭示气液共面结构极端尺寸下的相变传热机理。基于迫切的产业化需求，项目的实施将突破极端超薄均热板制造技术，建立其设计、制造及传热理论体系，具有重要的学术研究意义与实际应用价值。

In view of the extremely limited heat dissipation space of light and thin electronic devices in the 5G era, the research on gas-liquid coplanar ultra-thin vapor chambers (thickness ≤0.2mm) of high-efficiency thermal management devices will be carried out. In order to break the limitation of the existing ultra-thin vapor chambers that is difficult to be further ultra-thin, this project proposes a new gas-liquid coplanar structure. The working fluid flow and pressure drop models under the gas-liquid coplanar design will be established to reveal the influence mechanism of vapor-liquid motion. By using different manufacturing techniques, this project will also achieve micro-nano functional structure manufacturing and precise control of the surface morphology on the woven mesh wicks, to improve the capillary performance and avoid blockage of the gas-liquid channel and reveal the influence mechanism of surface morphology on phase change heat transfer of the wick. Following the design and manufacture of the ultrathin vapor chambers, systematically experimental and theoretical research on the heat transfer performance will be conducted, aiming to establish the correlation model of the wick structure and the heat transfer performance of the vapor chambers and reveal the phase change heat transfer mechanism under the extreme dimensions of the gas-liquid coplanar structure. Based on urgent industrialization needs, the project will break through the manufacturing technology of extremely ultra-thin vapor chambers, and build the design, manufacturing and heat transfer theoretical systems, which has important academic research significance and practical application value.