Acoustical measurements during a static firing of the Space Launch System solid rocket motor

Reichman, Brent O.; Harker, Blaine M.; Stout, Trevor A.; Whiting, Eric B.; Gee, Kent L.; Neilsen, Tracianne B.

doi:10.1121/2.0000646

Cited by 2 publications

(3 citation statements)

References 22 publications

(31 reference statements)

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“…The measurement locations of the QM-2 rocket were chosen to be close to those of the earlier QM-1 measurements [1], but additional preparation time enabled more measurement stations. The QM-1 measurement had measurement stations at 70°, 90°, and 120°, measured relative to the nozzle axis with 0° being along the nozzle centerline downstream of the nozzle.…”

Section: Measurement Setupmentioning

confidence: 99%

“…[2] The waveforms are inspected for evidence of nonlinear propagation using the derivative skewness metric, and then results are compared with the QM-1 measurement. [1] …”

Section: Introductionmentioning

confidence: 99%

“…The QM-1 measurements and analyses were reported in Ref. [1]. In June 2016, a horizontal, static firing test of QM-2 took place at Orbital ATK near Brigham City, Utah, and was open to the public behind a fence at a safe distance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Acoustic measurements in the far field during QM-2 solid rocket motor static firing

Reichman¹,

Harker²,

Neilsen³

et al. 2016

Proceedings of Meetings on Acoustics

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Section: Measurement Setupmentioning

confidence: 99%

“…[2] The waveforms are inspected for evidence of nonlinear propagation using the derivative skewness metric, and then results are compared with the QM-1 measurement. [1] …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Acoustic measurements in the far field during QM-2 solid rocket motor static firing

Reichman¹,

Harker²,

Neilsen³

et al. 2016

Proceedings of Meetings on Acoustics

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Characterization of Falcon 9 launch vehicle noise from far-field measurements

Mathews

Gee

Hart

2021

The Journal of the Acoustical Society of America

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This study investigates source-related noise characteristics of the Falcon 9, a modern launch vehicle with a high operational tempo. Empirical prediction of the noise characteristics of launched rockets has long been a topic of study; however, there are relatively few comparisons with high-fidelity, far-field data, and historical inconsistencies persist. Various quantities are considered: overall directivity, overall sound power, maximum overall sound pressure level (OASPL), and peak frequency. The noise directivity of the Falcon 9 vehicle is shown to be between two disparate ranges given in the historical literature, but the observed peak directivity angle is well represented using convective Mach number concepts. A comparison between mechanical and acoustic power yields a radiation efficiency is consistent with the literature. Two independent methods of predicting maximum OASPL produce results accurate within 2 dB, even at distances of several kilometers. Various scaling parameters are calculated for observed spectral peak frequency and connect these measurements with prior observations. Finally, the impact of terrain shielding on levels and spectra is assessed. These determined source characteristics of the Falcon 9 vehicle provide a connection to prior launch vehicle acoustics studies, which helps identify useful models and methods for understanding rocket noise.

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Acoustical measurements during a static firing of the Space Launch System solid rocket motor

Cited by 2 publications

References 22 publications

Acoustic measurements in the far field during QM-2 solid rocket motor static firing

Acoustic measurements in the far field during QM-2 solid rocket motor static firing

Characterization of Falcon 9 launch vehicle noise from far-field measurements

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