激波隧道中基于加速度计的力平衡的阻力和滚动力矩测量

IF 1.7 4区 工程技术 Q3 MECHANICS
B. Jang, K. Kim, G. Park
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引用次数: 0

摘要

采用加速度计技术设计了一种多分量力天平,用于测量车辆的阻力和滚动力矩。力平衡系统采用线性球衬套作为新的模型安装系统,最大限度地减少了试验模型在轴向和旋转方向上运动的约束。测试模型在轴向和旋转方向上的加速度通过安装在测试模型外部的加速度计来测量。利用包含力平衡系统动态特性的系统响应函数从测量的加速度中恢复阻力和滚动力矩。通过在轴向和旋转方向施加一系列点载荷,并对产生的加速度进行反卷积,从力平衡校准过程中确定系统响应函数。楔形模型(包括襟翼)的阻力和滚动力矩测量在激波通道中进行,测试时间约为3 ms,标称自由流马赫数为6。计算流体力学(CFD)分析假设层流边界层。实测结果与计算结果吻合较好。针对试验条件和力平衡系统基本特性的影响,对测量结果进行了不确定度分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Drag and rolling moment measurements using accelerometer-based force balance in a shock tunnel

Drag and rolling moment measurements using accelerometer-based force balance in a shock tunnel

A multicomponent force balance was designed to measure the drag and rolling moment using an accelerometer-based technique. The force balance system used a linear ball bush as a new model mount system to minimize the constraint of the test model motion in both the axial and rotational directions. The accelerations of the test model were measured in the axial and rotational directions using accelerometers that were externally mounted on the test model. The drag and rolling moment were recovered from the measured accelerations using the system response functions, which included the dynamic characteristics of the force balance system. The system response functions were determined from the force balance calibration processes by applying a series of point loads in the axial and rotational directions and deconvolving the resulting accelerations. The drag and rolling moment measurements on the wedge model, including the flaps, were performed in a shock tunnel with a test time of approximately 3 ms at a nominal freestream Mach number of 6. A computational fluid dynamics (CFD) analysis assuming a laminar boundary layer was performed. Good agreement was obtained between the measured and calculated results. An uncertainty analysis of the measurements was conducted with regard to the influence of the fundamental properties of the test condition and force balance system.

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来源期刊
Shock Waves
Shock Waves 物理-力学
CiteScore
4.10
自引率
9.10%
发文量
41
审稿时长
17.4 months
期刊介绍: Shock Waves provides a forum for presenting and discussing new results in all fields where shock and detonation phenomena play a role. The journal addresses physicists, engineers and applied mathematicians working on theoretical, experimental or numerical issues, including diagnostics and flow visualization. The research fields considered include, but are not limited to, aero- and gas dynamics, acoustics, physical chemistry, condensed matter and plasmas, with applications encompassing materials sciences, space sciences, geosciences, life sciences and medicine. Of particular interest are contributions which provide insights into fundamental aspects of the techniques that are relevant to more than one specific research community. The journal publishes scholarly research papers, invited review articles and short notes, as well as comments on papers already published in this journal. Occasionally concise meeting reports of interest to the Shock Waves community are published.
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