Evaluation of Cryogenic Force Balance Calibration Methodologies Relative to Wind Tunnel Results

Burns, Devin E.; Toro, Kenneth G.; Parker, Peter A.; Rivers, S. Melissa; Quix, Harald; Wright, Martin C.

doi:10.2514/1.c035211

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…For example, the BCM was capable of apply 35% of the full-scale load for side force of the NTF-118A. 5 This is not a particular drawback of the system, since its capability was intended for ETW's load ranges.…”

Section: A Calibration Methodologiesmentioning

confidence: 99%

Comparative Analysis of Two Cryogenic Force Balance Calibration Systems

Toro

Burns

Parker

2018

2018 Aerodynamic Measurement Technology and Ground Testing Conference

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Cryogenic wind-tunnel facilities face unique challenges in the calibration and operation of various measurement systems and instrumentation. Instruments that are subjected to the cryogenic conditions of the test plenum require careful design and calibration procedures to maintain instrument performance. NASA's National Transonic Facility (NTF) and the European Transonic Windtunnel (ETW) are two cryogenic wind-tunnel facilities, each with the ability to calibrate force measurement systems (FMS) at cryogenic conditions. These facilities have different methodologies and processes for calibrating these systems. This paper discusses differences in the methodologies and processes and compares the results of two separate cryogenic calibrations of the NTF-118A force balance that were completed at both wind-tunnel facilities.

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Section: A Calibration Methodologiesmentioning

confidence: 99%

Comparative Analysis of Two Cryogenic Force Balance Calibration Systems

Toro

Burns

Parker

2018

2018 Aerodynamic Measurement Technology and Ground Testing Conference

Self Cite

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“…Certain balances were designed to handle supersonic [9] and hypersonic flow [10], [11], [12], as well as able to read forces in areas where the Reynold's number is significantly lower than normal conditions [13], [14]. Extreme cold temperatures are also considered when designing aircraft to fly high in the atmosphere, so a normal force balance must be calibrated correctly to negate the thermal compression the balance experiences [15]. Finally, it has been found that balances have been designed to measure both sudden impulses [16] and forces over time to get a frequency reading [17], [18].…”

Section: List Of Figuresmentioning

confidence: 99%

Design optimization of a wind tunnel force balance using stepwise response surface method

Chaisson

Lee²,

Burns³

2022

J Mech Sci Technol

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applied to a body during a wind tunnel test. The balance is equipped with strain gauges that measure structural deformations for evaluation of the forces and moments being applied to the body. The force balance is required to have structural safety under a large roll moment, due to design changes with the testing apparatus. The balance must be optimized to allow for this increased roll moment while guaranteeing the balance will not fail and the gauges within the balance will generate an acceptable gauge reading.

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