Rapid Estimation of Supersonic Civil Aircraft Sonic Boom Characteristics in Standard Atmosphere Based on Analytical Solutions. Cruise Flight

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

A method for rapid estimations of supersonic civil aircraft sonic boom characteristics in standard atmosphere is proposed. The piece-wise linearity of the temperature profile and the absence of atmospheric wind allow to completely reduce the problem on the geometry of the propagation of sonic boom waves to an algebraic form. For acoustic pressure, an exact solution is formulated on the basis of the approach of nonlinear geometric acoustics. The dependence of the geometry of the sonic boom waves propagation on the parameters of the aircraft cruise flight is analyzed. Under the conditions of the third seminar SBPW (Sonic Boom Prediction Workshop) 2020, ground overpressure signatures from the X-59 demonstrator were calculated.

Толық мәтін

Рұқсат жабық

Авторлар туралы

A. Korunov

Central Aerohydrodynamic Institute

Хат алмасуға жауапты Автор.
Email: korunov.ao@phystech.edu
Ресей, Zhukovsky

V. Gusev

Central Aerohydrodynamic Institute; Lomonosov Moscow State University

Email: vgusev@bk.ru
Ресей, Zhukovsky; Moscow

V. Gorbovskoy

Central Aerohydrodynamic Institute

Email: korunov.ao@phystech.edu
Ресей, Zhukovsky

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2. Fig. 1. (a) - Initial conditions on the Mach cone and (b) - angular positions of the air velocity vector

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3. Fig. 2. Initial conditions for the acoustic pressure

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4. Fig. 3. (a) - Inverse Mach conoids and (b) - lines of intersection of inverse conoids with the ground surface in a cruising flight of an aircraft at an altitude of 15 km at different Mach numbers

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5. Fig. 4. (a) - Inverse Mach conoids intersection lines with the ground surface in cruising flight with Mach number M = 1.5 and (b) - family of dependences of perturbed region width on Mach number at different cruising altitudes

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6. Fig. 5. (a) - Solutions for the function P and (b) - potential F in the case φ = 0°

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7. Fig. 6. (a) - Initial overpressure epuples and (b) - corresponding epuples on the ground for different azimuthal angles of ray exit

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8. Fig. 7. Ground overpressure diagrams in the ideal medium approximation (solid lines) and taking into account dissipative factors (dashed lines) [19] for azimuthal angles (a) - φ = 0°, (b) - φ = 20° and (c) - φ = 40°

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