Force measurement in a shock tunnel with 100 milliseconds test duration

	Force measurement in a shock tunnel with 100 milliseconds test duration
	Wang YP(汪运鹏); Liu YF(刘云峰); Luo ZT(罗长童); Jiang ZL(姜宗林)
会议录名称	34th AIAA Applied Aerodynamics Conference
	2016
会议名称	34th AIAA Applied Aerodynamics Conference, 2016
会议日期	June 13, 2016 - June 17, 2016
会议地点	Washington, DC, United states
摘要	Force tests were conducted at the long-duration-test shock tunnel JF12, which has been designed and built in the Institute of Mechanics, Chinese Academy of Sciences. The performance tests demonstrated that this facility is capable of reproducing a flow of dry air at Mach numbers from 5–9 at more than 100 ms test duration. Therefore, the traditional internal strain-gauge balance was considered for the force tests use in this large impulse facility. However, when the force tests are conducted in a shock tunnel, the inertial forces lead to low-frequency vibrations of the test model and its motion cannot be addressed through digital filtering because a sufficient number of cycles cannot be found during a shock tunnel run. The post-processing of the balance signal thus becomes extremely difficult when an averaging method is employed. Therefore, the force measurement encounters many problems in an impulse facility, particularly for large and heavy models. The objective of the present study is to develop pulse-type sting balance by using a strain-gauge sensor, that can be applied in the force measurement that 100 ms test time, especially for the force test of the large-scale model. Different structures of the S-series (i.e., sting shaped balances) strain-gauge balance are proposed and designed, and the measuring elements are further optimized to overcome the difficulties encountered during the measurement of aerodynamic force in a shock tunnel. In addition, the force tests were conducted using two large-scale test models in JF12 and the S-series strain-gauge balances show good performance in the force measurements during the 100 ms test time. © 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
关键词	Aerodynamic Forces Chinese Academy Of Sciences Different Structure Digital Filtering Large Scale Modeling Low Frequency Vibration Strain Gauge Balances Strain Gauge Sensors
课题组名称	LHD激波与爆轰物理
ISBN号	9781624104374
URL	查看原文
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60150
专题	高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Wang YP,Liu YF,Luo ZT,et al. Force measurement in a shock tunnel with 100 milliseconds test duration[C]34th AIAA Applied Aerodynamics Conference,2016.

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