Correlation of total sound power and peak sideline OASPL from jet exhausts

Vonglahn, U. H.

doi:10.2514/6.1972-643

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Trw Systems Group Redondo Beach Calif1

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1973

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Cited by 2 publications

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“…The two basic equations are (2) In addition, we define a total temperature locally by the relation (3) All flow properties in the nozzle are assumed to have timeindependent and time-dependent parts, namely, p(x 9 t)=p(x)+p'(x 9 t) T 0 (x 9 t)=T 0 (x) 9 T 0 '(x 9 t) = (…”

Section: Discussionmentioning

confidence: 99%

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Flow properties fluctuations in a convergent-divergent nozzle.

Bose

1973

Journal of Spacecraft and Rockets

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Nomenclature A= nozzle cross-section, m 2 a = velocity of sound, /w/sec c p = specific heat at constant pressure, //kg°K / =(-l) 0 ' 5 M = JVIach number P -pressure fluctuation amplitude at x = 0, bar or N/m 2 p = pressure, bar or N/m 2 T, T 0 = static, total temperature, respectively, °K t = time, sec u = flow velocity, °K x = axial coordinate y = specific heat ratio = a function, Eq. (7) A = sound frequency-amplitude increase due to fluctuation, ra/sec v = frequency Subscripts and Superscripts (~) = average quantity ( )' = fluctuating quantity ( )jc = partial derivative with respect to x ( ) t = partial derivative with respect to t

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Section: Discussionmentioning

confidence: 99%

“…1 * 2 SPS requirements for initial station aquisition, repositioning, attitude control, and stationkeeping are discussed in Ref. 3. Geosynchronous mission requirements for the colloid SPS, as well as its ability to meet these requirements, are described in Ref.…”

Section: Trw Systems Group Redondo Beach Califmentioning

confidence: 99%