中文摘要：

通过采用直径分别为5．5mm及6mm的芯棒制作外径是8mm、烧结层长度分别占总长度的1／3、2／3及1的复合型吸液芯热管（分别命名为GO、GT和GF），对其极限传递功率（MHTP）、蒸发端、冷凝端及总热阻进行比较。研究烧结长度对复合型吸液芯热管传热性能的影响。工质的填充状态有两种：①吸液芯孔隙填满工质；②填充相同工质量。结果发现：两种工质灌注状态对热阻的影响较小，对MHTP的影响较大。芯棒直径5．5mm时，状态①中，GO、GT、GF的MHTP都达100w以上；状态②中，GF则只达到80W。芯棒直径6mm时，状态①中，GO、GT、GF的MHTP分别为100W以上、80w、60W；状态②中，GO、GT、GF的MHTP则分别为80W、100W以上、80W。减少吸液芯烧结层的长度可有效降低热管总热阻，吸液芯厚度相同时，GT或GO总热阻相对GF至少可减少33％。输入功率60～100W时，同根热管总热阻大小变化〈0．01℃／W。吸液芯厚度增加0．25mm时，相同烧结长度的热管总热阻大小相差〈0．01℃／W。两种工质灌注状态都表明烧结层长度对复合热管蒸发段热阻影响较小，主要对冷凝端及总热阻有影响，其中热管冷凝端热阻的变化趋势与总热阻相同。

英文摘要：

An experimantal study on how the length of sintering effect the heat transfer performance of composite-wicked heat pipes is presented. The sintering length is 1/3,2/3 or 1 of the total length of the heat pipe（named GO, GT and GF） with outer diameter of 8 mm which is made by using mandrel with di- ameter of 5.5 mm and 6 mm. Working fluid is filled in two methods： （1）filling all pore of wicks; （2）filling the same quility. There are several conclusions according to the investigation of maximum heat transfer power（MHTP）, evaporator thermal resistance, condenser thermal resistance and the total thermal resist- ance（Rtotal） ： The method of filling working fluid has less effect on the thermal resistance but more on the MHTP. With mandrel in diameter of 5.5 ram, the MHTP of GO,GT and GF all get more than 100 W in method （1）, while GF only get 80 W in method （2）. With mandrel in diameter of 6mm, the MHTP of GO, GT and GF get more than 100 W,80 W and 60 W respectively in method （1）, while get 80 W, more than 100 W and 80 W respectively in method （2）. Reducing the length of sintering results in the Rtotal Of heat pipe decreasing. The RtotaI of GO and GT can reduce 33 % relative to GF with the same wick thickness. The Rtotal of the heat pipe change less than 0.01 ℃/W with input powder varies from 60 W to 100 W. When the wick thickness 0.25 mm thicker, the difference of Rtotal Of heat pipes with the same sintering length is also less than 0.01 ℃/W. Both methods showed that the length of sintering has less effect on the evaporator ther- mal resistance but have more effect on the condenser and the total thermal resistance, in which the con- denser thermal resistance is of the same trend with the total thermal resistance.