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Instrumentation in Aerospace Simulation Facilities, 1995. ICIASF '95 Record., International Congress on

18-21 July 1995

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  • ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities

    Publication Year: 1995
    Request permission for commercial reuse | PDF file iconPDF (363 KB)
    Freely Available from IEEE
  • Author's index

    Publication Year: 1995
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  • An image resection method applied to mapping techniques

    Publication Year: 1995, Page(s):46/1 - 46/8
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1368 KB)

    Mapping techniques have emerged as reliable measurement methods in a wide variety of fields. This is the case for temperature mapping and flow field visualization. Another promising technique is pressure mapping based on pressure-sensitive paints. All these mapping methods provide images which are very useful by themselves because 2D or 3D views allow improved knowledge about the studied behavior.... View full abstract»

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  • Authors Biographies

    Publication Year: 1995
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    Freely Available from IEEE
  • Experimental investigation of supersonic/hypersonic flow fields based on a new approach using holographic optical techniques

    Publication Year: 1995, Page(s):10/1 - 10/7
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    This paper describes a holographic approach designed to provide a comprehensive acquisition of the optical information obtained from supersonic/hypersonic flow fields. A simultaneous application of three holographic diagnostic techniques, namely, schlieren- and shadowgraphy, moire deflectometry and interferometry, yields a more accurate measurement of the density distribution in complex compressib... View full abstract»

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  • Non intrusive flow diagnostic applications in high-enthalpy flow facilities

    Publication Year: 1995, Page(s):9/1 - 910
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1028 KB)

    The development of non-intrusive flow diagnostic instrumentation at AEDC is directed toward applications in high-enthalpy test facilities, especially in the arc- and shock-heated wind tunnels used for hypersonic research, test, and evaluation. The primary requirement is to characterize and calibrate the facility freestream flows that result from the nozzle expansion of high-temperature gases produ... View full abstract»

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  • Thin flat internal strain gauge balances for testing slab delta wing models at hypersonic speeds

    Publication Year: 1995, Page(s):18/1 - 18/6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Details of a 2.5 mm thick, 3-component balance and a 4 mm thick, 6-component balance, which can be housed inside thin slab delta wing models are given. The 3-component balance has been used to generate data on aerodynamic characteristics of slab delta wing models in the pitch plane and to demonstrate the considerable amount of interference introduced by lee-side housings used in conjunction with r... View full abstract»

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  • The evaluation of shear sensitive liquid crystals at Mach 3

    Publication Year: 1995, Page(s):8/1 - 8/6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    This paper examines the performance of a range of shear sensitive liquid crystals (manufactured by Hallcrest) in wind tunnel boundary layers upto Mach 3. The changes in observed color were assessed, using digital analysis of CCD video recordings, in terms of the hue, saturation and intensity. The measurement program included the assessment of crystal behavior under the following conditions: (i) tu... View full abstract»

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  • Laser-2-Focus data analysis using a nonlinear regression model

    Publication Year: 1995, Page(s):22/1 - 22/8
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A new approach to determine the first and second order flow field statistics from Laser-2-Focus (or Laser Transit) anemometer measurement was developed. It is based on non-linear regression fits of the probability density function to the measured data. The main advantages to previous methods are enhanced noise handling capabilities, reduced measuring time and better treatment of measurements with ... View full abstract»

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  • The ARA large scale thrust measuring rig

    Publication Year: 1995, Page(s):17/1 - 1712
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1060 KB)

    The Large Scale Thrust Measuring Rig (LSTMR) which is installed at the Aircraft Research Association's site at Bedford, England, is a twin stream facility capable of supplying the separate Core and Bypass (Fan) flows to typical engine nozzle/after body models. The rig, which is able to be operated with either cold or hot core flow, provides the means of assessing the performance of single or twin ... View full abstract»

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  • Design and calibration of a new surface-obstacle skin-friction and flow direction meter

    Publication Year: 1995, Page(s):7/1 - 7/7
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    Calibration data of surface-obstacle skin friction meters, including blocks, fences, Preston tubes and Stanton tubes, are examined throughout the available ranges of dimensionless wall-shear-stress and pressure-differential parameters. The calibration relationships, including the effect of compressibility, are reformulated in terms of variables containing physical quantities at the wall and includ... View full abstract»

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  • Use of laser Doppler anemometry in the investigation of roughness particle induced transition on suction surfaces

    Publication Year: 1995, Page(s):52/1 - 5210
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    This paper examines the effect of isolated surface roughness elements on the development of suction stabilised laminar boundary layers. Laser Doppler anemometry was used to enable detailed flow measurements to be taken within the boundary layer over porous suction surfaces, using several techniques which are described and illustrated in the paper. These ranged from pseudo-visualisation of the indu... View full abstract»

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  • Dissolved oxygen quantitation in fuel through measurements of dynamically quenched fluorescence lifetimes

    Publication Year: 1995, Page(s):39/1 - 39/6
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    An optical method for the quantitation of dissolved molecular oxygen in aviation fuels has been developed to aid the study of thermally induced fuel oxidation. The technique is based on the propensity of dissolved molecular oxygen to quench probe molecule fluorescence excited with a pulsed nitrogen laser. Linear calibration curves based on Stern-Volmer kinetics are generated through measurement of... View full abstract»

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  • Quantitative density measurements in a Mach 6 flow field using the Rayleigh scattering technique

    Publication Year: 1995, Page(s):13/1 - 13/7
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Using a narrow-band, pulsed, ArF excimer laser and a single-intensified CCD camera, planar laser Rayleigh scattering measurements were performed to obtain quantitative density measurements both in the free stream and in a model flow field. These measurements were conducted in the 15-inch, Mach 6 high temperature facility at NASA Langley Research Center. This facility is capable of achieving stagna... View full abstract»

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  • Use of the modified miniature-LDA in high spatial resolution application

    Publication Year: 1995, Page(s):21/1 - 21/5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Measuring the velocity structure of a boundary layer surrounding a cone, not only in subsonic, but also in transonic and supersonic is not yet possible. Therefore, the construction of a laser Doppler anemometer is demanded to realize these measurements. Based on the construction of the miniature-LDA, boundary layer measurements with very high spatial resolution of 25 μm were possible. The opto-... View full abstract»

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  • An investigation on the interference of internal six-component wind tunnel balances with FEM

    Publication Year: 1995, Page(s):16/1 - 1610
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    One of the factors which affect the accuracy of an internal wind tunnel balance is the interference. Within the scope of conventional balance configuration the reasons for the interference and the possibility of reduction were analysed with FEM. It proves that both the linear and nonlinear interferences can be reduced through a better design of structure, but they can't be totally eliminated. Ther... View full abstract»

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  • First Experience with a Fast Staring Infrared Camera System

    Publication Year: 1995
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    First Page of the Article
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  • Traversing system for full-scale wind tunnel

    Publication Year: 1995, Page(s):43/1 - 43/7
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Measuring acoustic and aerodynamic properties of full-scale automobiles in a wind tunnel with a 250 km/h airstream demands a traversing system that is rigid enough to withstand the airstream without affecting measurement accuracy; sufficiently aerodynamic to reduce the effects of own noise on measurements; and highly accurate in positioning measurement instruments. The traversing system described ... View full abstract»

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  • Characterization of microfabricated shear stress sensors

    Publication Year: 1995, Page(s):6/1 - 6/7
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    This paper reports a dual effort to fabricate and calibrate micromachined shear stress sensors for wind tunnel instrumentation. Our team at CWRU has designed and fabricated both active and passive shear stress sensors based on microfabricated polysilicon lateral resonant structures. In addition to this effort, we have collaborated with Analog Devices to develop shear stress sensors with integrated... View full abstract»

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  • Application of pulse tube for the test of the engines of hypersonic aircraft

    Publication Year: 1995, Page(s):51/1 - 51/6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    At MH=10, 12.2; TOH=2400 K, POH=300-400 MPa in the hot-short aerodynamic tunnel, investigations of operating processes in the engine path of the scramjet model were performed. The model has rather simple external configuration. The inner channels are those ones which allow the burning of gaseous hydrogen as in sub- and super-sonic flows. Quantitative data on the di... View full abstract»

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  • Measurement of rotational temperatures near surfaces in hypersonic flow

    Publication Year: 1995, Page(s):38/1 - 38/7
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Rotational temperatures of NO in hypersonic flow have been measured by Laser-Induced Fluorescence (LIF) at low densities. In undisturbed free jet expansions, the experimental results are in good agreement with the theory of isentropic flows. Near a hot surface in the flow, the rotational temperature of the reflected molecules were determined at nearly free molecular conditions. Testing parameters ... View full abstract»

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  • A combined holographic interferometer and laser-schlieren system applied to high temperature, high velocity flows

    Publication Year: 1995, Page(s):12/1 - 12/7
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    The High Enthalpy tunnel in Gottingen (HEG) is operated by the German Aerospace Research Establishment (DLR). Nominal test conditions of a free stream Mach number of 10, reservoir enthalpies of up to 23 MJ/kg and reservoir pressures of up to 100 MPa make the HEG ideal to study the “hot” entry phase of space vehicles. For the flow visualisation in the HEG a holographic interferometer wi... View full abstract»

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  • Large-area velocity measurement in low-speed flows

    Publication Year: 1995, Page(s):20/1 - 20/9
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    Spatial cross-correlations are used to measure velocity fields over large areas from time-separated images of instantaneous patterns in flow sections. The location of the cross-correlation peak between corresponding sub-images determines the 2-D displacement vector. Since particle image features are not sought, white light and large areas can be used as well as lasers. A single video camera is ade... View full abstract»

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  • Infrared inspection method for actively cooled panels

    Publication Year: 1995, Page(s):15/1 - 1511
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1528 KB)

    This paper discusses a new technique for determining the integrity of Actively Cooled Thermal Protection Systems designed for testing in high heat flux environments. These components, which use common as well as leading edge materials, are expensive and time consuming to fabricate. Using commercial thermography systems, a technique has been developed to detect blocked passages that would effect th... View full abstract»

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  • Instrumentation techniques of the Aachen shock tunnel TH2

    Publication Year: 1995, Page(s):1/1 - 116
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1100 KB)

    High enthalpy short-duration facilities are mainly used to simulate the hypersonic flow during a reentry into an atmosphere. The special operational features of these facilities put somewhat different requirements on the instrumentation compared to usual supersonic or hypersonic blow down tunnels. The short running times of the order of some milliseconds require sensors with a very fast response a... View full abstract»

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