Measurement of Pressures and Heat Transfer by FM Telemetry

McDevitt, John B.; Harrison, D. R.; Lockman, W. K.

doi:10.1109/taes.1966.4501714

Cited by 5 publications

(1 citation statement)

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“…10 Mach-Reynolds number simulation map of shock tunnel. 10,11,32,[41][42][43][44][45][46][47] to should employ the free-flight telemetry technique insure interference free valid data. In addition, ground test facilities should be chosen that have the capability to simulate entry trajectories for Mars, Venus and Jupiter probes.…”

Section: Ground Test Requirements and Data Correlationsmentioning

confidence: 99%

A Base Pressure Experiment for Determining the Atmospheric Pressure Profile of Planets

Cassanto

1973

Journal of Spacecraft and Rockets

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An experiment is described which consists of monitoring the base pressure of an entry probe and deriving the freestream pressure profile of a planet through correlation curves which directly relate base pressure to freestream pressure for the varying trajectory conditions. The experiment/technique is applicable for Mars, Venus, and Jupiter entry probes. The base pressure experiment offers distinct advantages to an entry probe mission such as a positive indication of where M x = 1 occurs in the entry trajectory, a positive indication of boundary-layer transition onset, and a freestream pressure boundary condition at the A/ x = 1.2 trajectory point independent of any other onboard or offboard measurements. The results of a recent slender cone R/V flight test have demonstrated the feasibility of the experiment by deriving the atmospheric pressure profile of Earth from base pressure measurements. Available flight and ground test base pressure data have been reviewed and an assessment made of which parameters are important to the base flow phenomena, which are well known and which require more investigaton to calibrate the experiment by obtaining additional data. Nomenclature A = base area D B -base diameter M L = local Mach number preceding the base MOO = freestream Mach number m= mass addition rate m/pAV -mass addition parameter P b = base pressure P b /P n -base pressure ratio P L = local cone pressure preceding the base P^ = freestream pressure Re D = freestream Reynolds number based on diameter R/V = re-entry vehicle rJR = radius ratio on base r/R = nose to base radius bluntness ratio V = velocity X/L = axial station a = angle of attack 0 = offset angle on base 6 C = cone angle 7 = ratio of specific heats p = freestream density

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Section: Ground Test Requirements and Data Correlationsmentioning

confidence: 99%

A Base Pressure Experiment for Determining the Atmospheric Pressure Profile of Planets

Cassanto

1973

Journal of Spacecraft and Rockets

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FM Telemetry for Multiple Force Measurements on Free-Flying Models

Harrison

Coon

Mateer

et al. 1968

IEEE Trans. Aerosp. Electron. Syst.

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CaCN )The extension of the FM telemetry technique to provide simultaneous CN O 2 a=o measurements of four forces acting on a free-flight aerodynamic model COb'collector-to-base plus collector stray capaciis reported. Developments and procedures required to achieve the tance accuracy, linearity, and stability necessary for obtaining dynamic C, total effective capacitance in the tuned cirstability coefficients are described. System accuracy is believed to be cuit IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS

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