曹仲勋,申智勇,汪飞,董雪峰,张乃丹,张万福

• 1:国家能源集团科学技术研究院有限公司
• 2:上海理工大学能源与动力工程学院

摘要(Abstract)：

梳齿密封因其结构简单、方便维修及使用寿命长等特点被广泛应用于各类透平机械，反旋流装置可通过影响密封腔室内周向流动，减弱螺旋形效应引起的气流激振问题，提高密封系统稳定性。建立反旋流梳齿密封三维数值模型，计算分析不同结构参数下反旋流喷嘴对密封动力学特性影响。结果表明：反旋流喷嘴倾斜角度越小，系统阻尼越大、稳定性越高，当倾斜角度为30°时，有效阻尼为垂直角度入射时的4倍；反旋流喷嘴形状对密封动力特性及流动特性影响较小，2种喷嘴孔型交叉刚度均为负值且低频下二者交叉刚度差值约为5 k N/m、高频下约为1～2 k N/m；喷嘴数目越多，越能够抑制转子周向流动，利于系统稳定。

关键词(KeyWords)： 反旋流;梳齿密封;动力特性;计算流体力学

Abstract:

Keywords:

基金项目(Foundation): 国家能源集团科学技术研究院有限公司科技项目（WH2023Y02）;; 国家自然科学基金面上项目（51872361）~~

作者(Author): 曹仲勋,申智勇,汪飞,董雪峰,张乃丹,张万福

DOI: 10.19666/j.rlfd.202308134

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