A STUDY OF THE EFFECT OF FLOATING-ELEMENT MISALIGNMENT ON SKIN-FRICTION- BALANCE ACCURACY

A STUDY OF THE EFFECT OF FLOATING-ELEMENT MISALIGNMENT ON SKIN-FRICTION- BALANCE ACCURACY
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浮动元件错位对蒙皮摩擦平衡精度影响的研究

DOI：
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发表时间：
1964
期刊：
影响因子：
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通讯作者：
Francis B O'Donnell
Francis B O'Donnell
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文献类型：
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作者：
Francis B O'Donnell

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摘要：研究了浮元式蒙皮摩擦天平在试验面上偏心时的运行效果。不对准包括安装元件平行于测试表面，但在表面下方凹陷或突出。构建了一个驱动机构，该机构允许在大约0.003 in的范围内穿越天平及其元件。凹槽至0.003英寸。的投影。在马赫数为1.73至3.55的连续流风洞中，在几个雷诺数下，确定了不对准对平衡输出的影响。结果表明，任何程度的不对准都会导致平衡输出的变化。在凸出元素的情况下，输出中的此误差略大于嵌入元素的情况。不对准误差与马赫数或雷诺数之间没有一致的相关性。
Abstract : An experimental investigation was made of the effect of operating a floating-element-type skin friction balance with the element misaligned in the test surface. The misalignment consisted of mounting the element parallel to the test surface, but recessed below or projecting above the surface. A drive mechanism was constructed which permitted traversing the balance and its element through a range of approximately 0.003-in. of recess to 0.003-in. of projection. The effect of misalignment on balance output was determined in a continuousflow wind tunnel over a Mach Number range of 1.73 to 3.55, at several Reynolds Numbers. The results indicated that any degree of misalignment resulted in a change of balance output. This error in output was slightly larger for the case of a projecting element than for the recessed-element case. No consistent correlation between misalignment error and either Mach Number or Reynolds Number was found.