气垫式保真筒保压特性的参数影响分析  

Parametric influence analyses for the pressure-holding characteristics of air-cushion fidelity canister

作　　者：安莉[1] 程烨[1] 秦华伟[2] 叶瑛[1] 俞祖英 徐著华 

机构地区：[1]浙江大学海洋学院,浙江杭州310058 [2]杭州电子科技大学机械电子工程研究所,浙江杭州310018 [3]四川海洋特种技术研究所,四川成都610000

出　　处：《海洋工程》2014年第3期110-115,121,共7页The Ocean Engineering

基　　金：国家"863"计划资助项目(2006AA09A206)

摘　　要：介绍配套了气垫式保真筒的深海天然气水合物采样器的结构及其工作原理,同时为提升气垫式保真筒的保压性能,基于压降模型仿真分析了关键参数(预充压力、气腔长度、筒体长度、筒体内径和筒体壁厚)对采样终了筒内压降的影响。仿真研究结果表明:预充压力、气腔长度和筒体壁厚对气垫式保真筒的保压性能影响较大,且取值越大保压效果越好;筒体长度、筒体内径与筒内压降正相关且对其影响较小;同时综合保真筒的整体性能来讲,提高预充压力和增加气腔长度是提高气垫式保真筒的保压性能可选的有效方式。In this paper, the structure and working principle of the gas hydrate fidelity sampler, supported by the gas-cushion fidelity canister, is introduced, and in order to enhance the pressure-holding characteristics of the gas-cushion fidelity canister, based on the sampler＇s pressure-drop model, the impact of the key parameters on the sampler＇s pressure-drop is studied by simulation. The simulation studies show that the precharge pressure, the length of air cavity and the thickness of canister have a great influence on the pressure-holding characteristics of the gas-cushion fidelity canister, in addition, the bigger the value is, the better the pressure-retaining result is; the diameter and length of the canister are positively correlated with the sampler＇ s pressure-drop and have little influence on it; and considering the whole performance of the gas-cushion fidelity canister, increasing the value of the precharge pressure and the length of air cavity is an effective way to enhance the pressure-holding characteristics of the air-cushion fidelity canister.

关 键 词：天然气水合物 采样器 保真筒 保压特性 参数影响 

分 类 号：TH766[机械工程—仪器科学与技术]