為了分析浮式液化天然氣平臺(tái)薄膜式儲(chǔ)罐底部斜坡對(duì)流體晃動(dòng)的影響規(guī)律,建立了仿真模型用于描述晃動(dòng)儲(chǔ)罐內(nèi)的流體行為.流體自由液面運(yùn)動(dòng)通過(guò)流體體積法和k-ε湍流模型進(jìn)行模擬,利用文獻(xiàn)中的實(shí)驗(yàn)數(shù)據(jù)和仿真結(jié)果對(duì)該模擬的準(zhǔn)確性進(jìn)行驗(yàn)證.為了研究底部斜坡對(duì)流體晃動(dòng)的影響,對(duì)不同斜坡尺寸、填充率以及儲(chǔ)罐低階固有頻率下的流體晃動(dòng)過(guò)程進(jìn)行了仿真模擬.結(jié)果顯示,固有頻率可由水力參數(shù)的平均峰值決定,固有頻率和儲(chǔ)罐壁面壓力載荷隨著斜坡尺寸的增大而減小,當(dāng)斜坡占比從5%增加到20%,壁面峰值壓力下降了5.4520kPa.但該壁面峰值壓力的變化只在填充率較低時(shí)明顯,當(dāng)填充率較高,如60%時(shí),流體運(yùn)動(dòng)特性穩(wěn)定,受斜坡結(jié)構(gòu)改變的影響很小.流體仿真建模與分析結(jié)果對(duì)薄膜式液化天然氣儲(chǔ)罐的優(yōu)化設(shè)計(jì)和運(yùn)行提供了數(shù)據(jù)支撐. 

【文章來(lái)源】：Journal of Southeast University（English Edition）. 2020,36(03)EI

【文章頁(yè)數(shù)】：9 頁(yè)

【文章目錄】：
1 Computational Model
    1.1 Governing equations
    1.2 Governing equations
    1.3 Grid independence study
2 Results and Discussion
    2.1 Verification and validation
    2.2 Influence of slope size on natural frequency
        2.2.1 Theoretical methods to locate the natural frequency
        2.2.2 Calculating natural frequency by the average peak method
        2.2.3 Influence of slope size on natural frequency
    2.3 Influence of slope size on sloshing behaviour
3 Conclusions



本文編號(hào)：3178937