环空管气—液两相流出现在石油开发的许多场合，与圆管两相流相比，对环空管两相流的研究却没有得到足够的重视．自８０ 年代以来，只有Ｓａｄａｔｏｍ ｉ、Ｃａｅｔａｎｏ、Ｋｅｌｅｓｓｉｄｉｓ、Ｈａｓａｎ 等少数研究者对环空管气—液两相流的流型、含气率及压力降等进行了研究．本文对２０ 年来环空管气—液两相流的研究进展进行了一些介绍，并对目前的研究现状进行了评述． The annular gas-liquid two-phase flow appears in many occasions of petroleum development. Compared with the circular two-phase flow, the research on the annular gas two-phase flow has not been paid enough attention. Since the 1980s, only a few researchers such as Sadatom i, Caetano, Kelessidis, Hasan and others have studied the flow pattern, gas-bearing ratio and pressure drop of gas-liquid two-phase toroidal tubes. In this paper, some progresses in the research on torpedo-gas two-phase flow in torpedo are introduced in this paper, and the current research status is reviewed.