| 仇宝云,刘超.探针杆挠曲对水流场测量的影响研究[J].水利学报,1999,30(11):0007-0012 |
| 探针杆挠曲对水流场测量的影响研究 |
| Study on influence of probe rod bending on flow field measurement |
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| DOI： |
| 中文关键词: 探针 水流场测量 绕流阻力 针杆挠曲 测量误差 误差修正 |
| 英文关键词: probe rod bending flow measurement flow drag measuring error error correction |
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| 中文摘要: |
| 绕流阻力引起探针杆弹性挠曲，针头挠度和转角造成测点位置误差和流速方向或分量测量误差。本文提出根据探针测定的原始速度分布求解针头在各测点处的转角，进而确定实际流速方向、流速分量和测点位置误差。方法成功地用于探针测定的三维流场的误差计算和修正。结果表明，沿杆长方向的流速误差最大，不能忽视。最后，给出误差修正计算实用近似方法。 |
| 英文摘要: |
| In this paper, a method for correcting the deviations of measuring position, flow direction and flow components due to probe rod bending caused by flow drag is suggested. Based on the quoins of the probe determined by the measured velocity distributions, the deviations can be calculated accordingly. This method is successfully applied to the estimation and correction of the measuring errors of a 3 D flow field. The result shows that the error of the flow component in the direction along the rod length is evident and not negligible. An approximate method for practical use is proposed. |
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