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阻尼网特性数值模拟

丛成华 廖达雄

丛成华, 廖达雄. 阻尼网特性数值模拟[J]. 北京航空航天大学学报, 2014, 40(12): 1691-1696. doi: 10.13700/j.bh.1001-5965.2014.0018
引用本文: 丛成华, 廖达雄. 阻尼网特性数值模拟[J]. 北京航空航天大学学报, 2014, 40(12): 1691-1696. doi: 10.13700/j.bh.1001-5965.2014.0018
Cong Chenghua, Liao Daxiong. Numerical investigation about field characteristics of screen[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1691-1696. doi: 10.13700/j.bh.1001-5965.2014.0018(in Chinese)
Citation: Cong Chenghua, Liao Daxiong. Numerical investigation about field characteristics of screen[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1691-1696. doi: 10.13700/j.bh.1001-5965.2014.0018(in Chinese)

阻尼网特性数值模拟

doi: 10.13700/j.bh.1001-5965.2014.0018
基金项目: 空气动力学国家重点实验室基金资助项目(SKLA-JBKY11040401)
详细信息
    作者简介:

    丛成华(1979-),男,山东泰安人,副研究员, cch_sd@163.com.

  • 中图分类号: V211.3

Numerical investigation about field characteristics of screen

  • 摘要: 依靠经验公式和工程估算等传统方法,无法对阻尼网性能进行精确评估.为确定阻尼网压力损失系数和降湍性能,采用计算流体力学方法,结合适当的边界条件,对阻尼网进行了模拟.使用数值模拟能够得到不同开孔率阻尼网在不同雷诺数、不同入射方向、不同目数的损失系数,与试验结果更为接近,在30°~45°大角度入射时得到的损失系数更为精确;在入射气流与阻尼网平面呈一定夹角时,阻尼网后的气流压力和速度呈现脉动趋势,传播距离大约为100d;在雷诺数小于40时流动保持层流状态,扰动传播距离为50d,此时降湍效果最好,随雷诺数增加,扰动传播距离增加至400d;在流动未失稳时,开孔率越低,降湍效果越明显,开孔率低于0.5时流动容易失稳;开孔率保持不变,随目数增加阻尼网损失系数增加明显,降湍能力提升.因此可以根据数值模拟结果选择阻尼网的最优参数.

     

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出版历程
  • 收稿日期:  2014-01-07
  • 刊出日期:  2014-12-20

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