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基于CFD的某化学品船预旋定子优化

韩聪 傅慧萍 马宁 杨晨俊

韩聪, 傅慧萍, 马宁, 杨晨俊. 基于CFD的某化学品船预旋定子优化[J]. 中国舰船研究, 2017, 12(1): 78-83. doi: 10.3969/j.issn.1673-3185.2017.01.012
引用本文: 韩聪, 傅慧萍, 马宁, 杨晨俊. 基于CFD的某化学品船预旋定子优化[J]. 中国舰船研究, 2017, 12(1): 78-83. doi: 10.3969/j.issn.1673-3185.2017.01.012
Cong HAN, Huiping FU, Ning MA, Chenjun YANG. Optimization of pre-swirl stators based on CFD for a chemical product carrier[J]. Chinese Journal of Ship Research, 2017, 12(1): 78-83. doi: 10.3969/j.issn.1673-3185.2017.01.012
Citation: Cong HAN, Huiping FU, Ning MA, Chenjun YANG. Optimization of pre-swirl stators based on CFD for a chemical product carrier[J]. Chinese Journal of Ship Research, 2017, 12(1): 78-83. doi: 10.3969/j.issn.1673-3185.2017.01.012

基于CFD的某化学品船预旋定子优化

doi: 10.3969/j.issn.1673-3185.2017.01.012
详细信息
    作者简介:

    韩聪, 男, 1994年生, 硕士生

    马宁, 男, 1961年生, 博士, 教授

    通信作者:

    傅慧萍(通信作者), 女, 1972年生, 博士, 副教授

  • 中图分类号: U664.33

Optimization of pre-swirl stators based on CFD for a chemical product carrier

知识共享许可协议
基于CFD的某化学品船预旋定子优化韩聪,等创作,采用知识共享署名4.0国际许可协议进行许可。
  • 摘要: 基于CFD通用软件FLUENT,对模型尺度下配置了舵球鳍和预旋定子的某55k DWT化学品船的自航性能进行数值模拟。通过推进效率的提高对定子的节能效果进行评估,并且几乎所有的自航因子在加定子后的变化趋势(如:转速降低、推力减额和伴流分数增大)计算结果都与试验结果一致。尾流能量分析进一步验证了定子的节能效果:可有效减少尾流中的动能。之后进行基于CFD的预旋定子优化,对原型之外的3个改型设计进行的数值模拟结果显示:这些改型定子的节能效果依次递增;推进效率最高的改型相对于无定子情形,其在桨前的动能增加最大,在桨后的动能减少也最大。
  • 图  1  坐标及建模示意图

    Figure  1.  Coordinate system and modeling of stern, stator, propeller and rudder-bulb-fin

    图  2  不带定子网格

    Figure  2.  Mesh without stator

    图  3  带定子网格

    Figure  3.  Mesh with stator

    图  4  敞水性能曲线

    Figure  4.  Open water performance curves

    图  5  推力余量

    Figure  5.  Excess thrusts at different rates of rotation

    图  6  原型Case 1示意图

    Figure  6.  Configuration of the prototype Case 1

    图  7  3个改型

    Figure  7.  Three optimized types

    图  8  桨盘面及与其平行的前后2个截面

    Figure  8.  Propeller plane and two parallel sections

    表  1  主尺度

    Table  1.   Main particulars

    Ship Model
    Lwl/m 182.8 6.75
    Tdes/m 10.5 0.387 7
    Dp/m 6.5 0.24
    U0/(m.s-1) 7.459 1.432
    下载: 导出CSV

    表  2  计算结果(不带定子)

    Table  2.   Computational results without stator

    Self-propelled EFD CFD Error/%
    Thrust coefficient KT 0.170 0 0.162 4 -4.5
    Torque coefficient KQ 0.019 8 0.020 6 4.0
    Thrust deduction t 0.206 0.271 31.6
    Effective wake wT 0.381 0.302 -20.7
    Hull efficiency ηH 1.283 1.044 -18.6
    Relative rotation efficiency ηR 1.027 1.015 -1.2
    Open water efficiency η0 0.555 0.558 0.5
    Advance ratio J 0.418 0.451 7.9
    Revolution rate n/s-1 8.85 9.23 4.3
    Propulsive efficiency ηD 0.731 0.591 -19.2
    下载: 导出CSV

    表  3  带定子前后的比较

    Table  3.   Comparison between with and without stator

    EFD CFD Agrees qualitatively
    Without stator With stator Without stator With stator
    KT 0.170 0 0.185 5 0.162 4 0.182 8
    KQ 0.019 8 0.020 9 0.020 6 0.022 4
    t 0.206 0.234 0.271 0.286
    wT 0.381 0.457 0.302 0.407
    ηH 1.283 1.411 1.044 1.204
    ηR 1.027 1.038 1.015 1.013 -
    η0 0.555 0.513 0.558 0.509
    J 0.418 0.378 0.451 0.397
    n/s-1 8.85 8.6 9.23 8.91
    ηD 0.731 0.751 0.591 0.621
    下载: 导出CSV

    表  4  改型与原型之间的比较

    Table  4.   Comparison of Case A~C and Case 1

    CFD
    Without stator Case 1 Case A Case B Case C
    KT 0.162 4 0.182 8 0.180 6 0.1827 0.1845
    KQ 0.020 6 0.022 4 0.022 5 0.022 7 0.022 9
    t 0.271 0.286 0.271 0.269 0.273
    WT 0.302 0.407 0.400 0.409 0.418
    ηH 1.044 1.204 1.215 1.236 1.249
    ηR 1.015 1.013 1.000 1.000 1.000
    η0 0.558 0.509 0.515 0.509 0.505
    J 0.451 0.397 0.403 0.397 0.392
    n/s-1 9.23 8.91 8.935 8.879 8.853
    ηD 0.591 0.621 0.626 0.629 0.631
    下载: 导出CSV

    表  5  截面A上的动能增量

    Table  5.   The increment of kinetic energy on section A relative to that without stator respectively

    Case 1 Case A Case B Case C
    ΔKax/% 2.58 3.94 4.04 8.16
    ΔKtr/% 0.93 -0.22 -0.31 3.00
    ΔKtotal/% 1.25 0.59 0.54 4.00
    下载: 导出CSV

    表  7  截面C上的动能增量

    Table  7.   The increment of kinetic energy on section C relative to that without stator respectivly

    Case 1 Case A Case B Case C
    ΔKax/% -14.88 -18.22 -18.74 -20.13
    ΔKtr/% -23.72 -24.08 -27.89 -27.57
    ΔKtotal/% -22.06 -22.98 -26.17 -26.18
    下载: 导出CSV

    表  6  截面B上的动能增量

    Table  6.   The increment of kinetic energy on section B relative to that without stator respectively

    Case 1 Case A Case B Case C
    ΔKax/% 7.58 6.51 5.13 12.18
    ΔKtr/% -10.41 -11.58 -14.26 -11.36
    ΔKtotal/% -7.00 -8.15 -10.58 -6.89
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-04-28
  • 网络出版日期:  2016-12-28
  • 刊出日期:  2017-01-07

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