2018 Aerodynamic Measurement Technology and Ground Testing Conference最新文献_第3页

Soft Sled - the Low Vibration Sled Test Capability at the Holloman High Speed Test Track 软台车——霍洛曼高速试验轨道的低振动台车试验能力

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3872

M. Hooser

引用次数: 0

Revolution-Based Processing of Oscillatory Signals in Rotating Equipment 旋转设备中振荡信号的转数处理

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3099

N. Harrison

引用次数: 0

Investigation of Soot Formation Near Flame-Wall Interaction Region in Rich Ethylene/Air Flames 富乙烯/空气火焰火焰壁相互作用区附近烟尘形成的研究

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3944

Ayush Jain, Yejun Wang, W. Kulatilaka

引用次数: 0

Development of Unsteady Pressure Sensitive Paint Measurement Capability at Arnold Air Force Base 阿诺德空军基地非定常压敏涂料测量能力的发展

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-4051

M. Sellers, Michael Nelson

引用次数: 3

Nitric Oxide Planar Laser-Induced Fluorescence Thermometry Measurements in a Hypersonic Boundary Layer 高超声速边界层中一氧化氮平面激光诱导荧光测温

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3629

C. McDougall, W. Hinman, C. Johansen, B. Bathel, J. Inman, P. Danehy

引用次数: 3

Improving High Enthalpy Expansion Tube Condition Characterisation Using High Speed Imagery 利用高速成像技术改进高焓膨胀管状态表征

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3805

C. James, Daniel R. Smith, C. McLean, R. Morgan, S. Lewis, P. Toniato

{"title":"Improving High Enthalpy Expansion Tube Condition Characterisation Using High Speed Imagery","authors":"C. James, Daniel R. Smith, C. McLean, R. Morgan, S. Lewis, P. Toniato","doi":"10.2514/6.2018-3805","DOIUrl":"https://doi.org/10.2514/6.2018-3805","url":null,"abstract":"Traditionally, Pitot rake test models have been used to take time and spatially resolved pressure measurements in impulse facilities for flow characterisation. These measurements allow the test section gas state to be inferred using analytical and more complex computational models. They also provide an indication of experimental test time and core flow diameter. However, being based on only one state variable, they are not definitive, and this gives motivation for developing methods based on other state variables. When expansion tubes are used for the study of hypervelocity planetary entry phenomena, generally the post-shock state in the test section strongly radiates, a phenomenon which is very sensitive to temperature. This paper provides a simple method which uses a high speed camera in addition to a conventional Pitot rake to improve estimates of experimental test time and core flow size by imaging post-shock radiative emission over the probes in the Pitot rake. This method can also be used with specific narrow bandpass optical filters to examine when the emission from key species remain constant in the test flow. The selection of and suitability of various optical filters for an air test gas is examined in this paper. Experimentally, it was found that the radiative emission generally rises quite abruptly at the end of the test time, and sometimes in situations where the pressure remains constant. It was also seen that different optical filters can show their abrupt rise at different times, giving differing values for the end of the test time. For the test condition studied, experiments performed at the entrance and exit of the test facility’s nozzle found that the test time in terms of flow radiative emission was similar in both cases.","PeriodicalId":373890,"journal":{"name":"2018 Aerodynamic Measurement Technology and Ground Testing Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134088387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Sweep Test Techniques to Reduce Cost of Turbine Engine Altitude Testing 降低涡轮发动机高度测试成本的扫描测试技术

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3097

A. Jackson

引用次数: 0

Statistical Analysis of the Results from Experimentation utilizing Wind Tunnel Angle Measurement Systems 风洞角度测量系统实验结果的统计分析

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-4110

Heidi S. Glaudel

引用次数: 2

Comparison of Detonation Initiation by Hot Jet and Obstacles Studied via Chemiluminescence Imaging at 200 kHz 200 kHz化学发光成像研究热射流起爆与障碍物的比较

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3947

Jiawei Zheng, Qingchun Lei, Jiannan He, Yeqing Chi, W. Fan

引用次数: 0

Measurements of Parachute Dynamics in the World’s Largest Wind Tunnel by Stereo Photogrammetry 用立体摄影测量法测量世界上最大风洞中的降落伞动力学

2018 Aerodynamic Measurement Technology and Ground Testing Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3802

E. Schairer, L. K. Kushner, J. Heineck, E. Solis

{"title":"Measurements of Parachute Dynamics in the World’s Largest Wind Tunnel by Stereo Photogrammetry","authors":"E. Schairer, L. K. Kushner, J. Heineck, E. Solis","doi":"10.2514/6.2018-3802","DOIUrl":"https://doi.org/10.2514/6.2018-3802","url":null,"abstract":"Between 2012 and 2017, parachutes for four NASA Projects were tested in the 80by 120Ft test section of the National Full-Scale Aerodynamic Complex (NFAC) at NASA Ames Research Center. These projects were: (1) Low-Density Supersonic Decelerator (LDSD); (2) Capsule Parachute Assembly System (CPAS, for Orion); (3) Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight, a Mars mission); and (4) Mars 2020. In all tests stereo photogrammetry was used to measure time-dependent positions of features on the canopies. For the LDSD and CPAS tests, where the purpose was to study the trade-off between stability and drag of different parachute designs, the pendulum motion of the canopies about the riser attachment point was measured by calibrated cameras in the diffuser. The CPAS test also included static measurements where the inflated parachutes were pulled to the side by a system of tethers. The Insight tests were structural qualification tests where each canopy was packed in a bag and launched from a mortar. Cameras in the diffuser measured the trajectory of the bag and the stripping of the bag from the canopy. The Mars 2020 test was a workmanship verification test where the canopies were either launched from a mortar or deployed from a sleeve stretched along the tunnel axis. The deployments were recorded from many directions by thirteen high-speed cameras distributed in the diffuser and test section. Photogrammetry was not planned; however, after a tunnel-related accident ended the test prematurely, photogrammetric measurements were bootstrapped from the images to support the accident investigations. This paper describes how the photogrammetry measurements were made in each test and presents typical results.","PeriodicalId":373890,"journal":{"name":"2018 Aerodynamic Measurement Technology and Ground Testing Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131468614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6