Evaluation of a force balance with semiconductor strain gages in wind tunnel tests of the HB-2 standard model

Abstract

A six-component wind tunnel balance of a robust, unconventional design was produced using semiconductor strain gages on a compression-type axial-force element. The balance was designed primarily for supersonic tests of high-drag models in short-duration wind tunnels. It was first used in a short crash program to test a design of a high-drag training kinetic-energy projectile. Obtained data were useful for the development of the projectile, but a lack of reliable references to validate the performance of the balance was felt, especially in view of the different opinions on the usability of semiconductor strain gages for wind tunnel balances. This issue was dealt with when the balance was used in wind tunnel tests of a HB-2 hypervelocity-ballistic standard model at Mach numbers 1.5 to 4, in a campaign of tuning the supersonic performance of the T-38 wind tunnel in VTI. Test results were compared with the reference data and with results from an earlier test of the same model where a conventional-design balance was used. The evaluation of the balance was focused on the measurement of the axial-force coefficient. It was concluded that the balance was very convenient for the intended type of wind tunnel tests, but not for general use.

Keywords

Wind tunnel balance standard model semiconductor strain gage wind tunnel testing HB-2

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References

Hufnagell K and Schewe G. Force and moment measurement. In: Tropea C, Yarin AL and Foss JF (eds) Springer handbook of experimental fluid mechanics. Berlin–Heidelberg: Springer-Verlag, 2007, pp.563–616.

Hannah

Reed

. Strain gage user’s handbook, London: Chapman and Hall, 1992.

Kulite . Strain gage manual, Leonia: Kulite Semiconductor Products Inc, 2012.

Anastasijević Z, Samardžić M and Marinkovski D. Application of semiconductor strain gauges in measurements of dynamic stability derivatives in the T-38 wind tunnel. In: Proceedings of the 26th congress of the international council of the aeronautical sciences, Anchorage, USA, 14–19 September 2008, paper no. ICAS2008-3.4.5. Bonn: ICAS.

Samardžić

Anastasijević

Marinkovski

. Measurement of pitch- and roll-damping derivatives using the semiconductor five-component strain gauge balance. Proc IMechE, Part G: J Aerospace Engineering 2012; 226: 1401–1411.

Vuković Đ, Samardžić M and Vitić A. Prototype of a stiff wind tunnel balance with semiconductor strain sauges and thermocompensation done by software. In: Proceedings of the 26th congress of the international council of the aeronautical sciences, Anchorage, USA, 14–19 September 2008, paper no. ICAS2008-P2.9. Bonn: ICAS.

Elfstrom GM and Medved B. The Yugoslav 1.5m trisonic blowdown wind tunnel, In: A collection of technical papers-14th AIAA aerodynamic testing conference, West Palm Beach, USA, 5–7 March 1986, paper no. AIAA 86-0746-CP. Reston: AIAA.

Vuković Đ. Investigation of supersonic transient loads in the T-38 1.5 x 1.5 m wind tunnel at Žarkovo. In: Proceedings of the 19th congress of the international council of the aeronautical sciences, Anaheim, USA, 18–23 September 1994, paper no. ICAS1994-5.1.4. Bonn: ICAS.

Damljanović

Mandić

Vuković

. Computational fluid dynamics and wind tunnel determination of the aerodynamic characteristics of an axi-symmetric projectile with a conical tail flare. SciTechRev 2011; 61(3–4): 49–55.

10.

Damljanović D. Measurement accuracy of flow field parameters in supersonic wind tunnels (in Serbian: Tačnost merenja parametara strujnog polja u supersoničnim aerotunelima). PhD Thesis, University of Belgrade, Serbia, 2013.

11.

Gray JD and Lindsay EE. Force tests of standard hypervelocity ballistic models HB-1 and HB-2 at Mach 1.5 to 10, AEDC-TDR-63-137. Arnold Engineering Development Center, 1963.

12.

Gray JD. Summary report on aerodynamic characteristics of standard models HB-1 and HB-2, AEDC-TDR-64-137. Arnold Engineering Development Center, 1964.

13.

Ceresuela R. Mesurés d’Efforts et de Pressions sur la Maquette Balistique Etalon HB-2 de Mach 2 a Mach 16.5, Note Technique 13/1879 A, ONERA., 1964.

14.

Lagutin VI, Lapygin VI and Trusov SS. Stress analysis of strain-gauge balance for “Lifting Body” models aerodynamic tests. In: 14^th International conference on methods of astrophysical research (ICMAR2008), Akademgorodok, Novosibirsk, 30 June to 6 July 2008. Russia: Russian National Committee on Theoretical and Applied Mechanics.

15.

AIAA/GTCC Internal Balance Technology Working Group. Recommended practice - Calibration and use of internal strain-gage balances with application to wind tunnel testing, AIAA-R-091-2003, 2003. Reston: AIAA.

16.

Samardžić M, Vuković Đ, and Marinkovski D. Experiments in VTI with semiconductor strain gauges on monoblock wind tunnel balances. In: 8^th International Symposium on Strain-Gauge Balances, Lucerne, Switzerland, 7–10 May 2102. Lucerne: RUAG.

17.

Bennett HH. Assessing long-term wind tunnel balance performance and uncertainty from multiple calibrations – Revisited. In: 8^th International Symposium on Strain-Gauge Balances, Lucerne, Switzerland, Lucerne: RUAG, 7--10 May 2012.

18.

Malcolm GN and Chapman GT. A computer program for systematically analyzing free-flight data to determine the aerodynamics of axisymmetric bodies. NASA TN D-4766, NASA – Ames Research Center, 1968.

19.

Wagner

. Mechanical behavior of 18 Ni 200 grade maraging steel at cryogenic temperatures. J Aircraft 1986; 23(10): 744–749.

20.

Rusch HF. Grain-refining heat treatments to improve cryogenic toughness of high-strength steels. NASA-TM 85816, 1984.

21.

Choi SK. Force balance measurement sensor in wind tunnel aerodynamic testing environments. USAF Developmental and Evaluation Summit, Woodland Hills, USA, 2004, paper AIAA-2004-6812.