CAJ | 학술논문

作为高效传热元件，振荡热管在解决微小空间但热通量较高的电子器件散热方面具有独特的优势，其工质的选取对振荡热管的传热性能具有重要影响。采用甲醇、丙酮纯工质及两者不同配比(7︰1,4︰1,1︰4,1︰7)的混合工质，对不同充液率(45%,62%,70%)和加热功率(10～100 W)工况时的热阻特性进行试验，分析甲醇、丙酮工质的物性及其相互作用特性对振荡热管传热性能的影响，得到甲醇/丙酮二元混合工质振荡热管的传热特性。结果表明：小充液率时，振荡热管蒸发段均出现明显的烧干现象，混合工质振荡热管烧干时热阻较纯工质小，即在50 W时，甲醇、丙酮纯工质振荡热管热阻分别为1.509℃/W、1.484℃/W，而甲醇/丙酮1︰7时振荡热管热阻为0.88℃/W，其他配比时热阻在纯工质及混合工质配比1︰7之间，特别是在丙酮中加入少量甲醇(比如甲醇/丙酮1︰7)能有效地改善振荡热管的烧干情况；大充液率下，混合工质振荡热管热阻随着加热功率的增大变得较为平缓且相互之间相差不是不大，传热性能普遍较好。
작위고효전열원건，진탕열관재해결미소공간단열통량교고적전자기건산열방면구유독특적우세，기공질적선취대진탕열관적전열성능구유중요영향。채용갑순、병동순공질급량자불동배비(7︰1,4︰1,1︰4,1︰7)적혼합공질，대불동충액솔(45%,62%,70%)화가열공솔(10～100 W)공황시적열조특성진행시험，분석갑순、병동공질적물성급기상호작용특성대진탕열관전열성능적영향，득도갑순/병동이원혼합공질진탕열관적전열특성。결과표명：소충액솔시，진탕열관증발단균출현명현적소간현상，혼합공질진탕열관소간시열조교순공질소，즉재50 W시，갑순、병동순공질진탕열관열조분별위1.509℃/W、1.484℃/W，이갑순/병동1︰7시진탕열관열조위0.88℃/W，기타배비시열조재순공질급혼합공질배비1︰7지간，특별시재병동중가입소량갑순(비여갑순/병동1︰7)능유효지개선진탕열관적소간정황；대충액솔하，혼합공질진탕열관열조수착가열공솔적증대변득교위평완차상호지간상차불시불대，전열성능보편교호。
As a high efficient heat transfer element, the oscillating heat pipe(OHP) has unique advantages in solving the problem of electronic device heat dissipation with tiny space and high heat flux and its heat transfer performance is greatly affected by its working medium. The methanol/acetone binary mixture, as well as the pure methanol, acetone, have been selected as working mediums of OHP, then the heat transfer characteristics of methanol/acetone OHP has been researched by analysing the physical properties of the working mediums and its interaction characteristics on heat transfer performance of OHP under different ratios(7︰1, 4︰1, 1︰4, 1︰7), filling ratios(45%, 62%, 70%)and heat inputs(10-100 W). The results show that all evaporator sections of OHP are dried out obviously with small filling ratios. Compared with pure working mediums, the thermal resistance of mixture working medium is smaller when dried out, namely when the heat input is 50 W, the pure methanol, acetone are 1.509 oC/W and 1.48 oC/W, the methanol/acetone 1︰7 thermal resistance is 0.88 oC/W, between them are the thermal resistances of the rest ratios. In addition, the effect is more obvious when little methanol is added into acetone as working medium (such as methanol/acetone 1︰7);With large filling ratios, the thermal resistances of mixture working mediums increased with little gradient and get close to each other as heat inputs increased gradually, the heat transfer performances are generally great.