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Impact of a Thermally Stratified Energy Source in a Supersonic Flow past a Pointed Cylinder Aerodynamic Model on the Pressure Signatures and PLdB Effect on the Ground
Kravchenko, O.V.; Azarova, O.A.; Knight, D.D. Impact of a Thermally Stratified Energy Source Located in Front of a Pointed Cylinder Aerodynamic Model on the Pressure Signatures and PLdB Effect on the Ground. Appl. Sci.2023, 13, 7927.
Kravchenko, O.V.; Azarova, O.A.; Knight, D.D. Impact of a Thermally Stratified Energy Source Located in Front of a Pointed Cylinder Aerodynamic Model on the Pressure Signatures and PLdB Effect on the Ground. Appl. Sci. 2023, 13, 7927.
Kravchenko, O.V.; Azarova, O.A.; Knight, D.D. Impact of a Thermally Stratified Energy Source Located in Front of a Pointed Cylinder Aerodynamic Model on the Pressure Signatures and PLdB Effect on the Ground. Appl. Sci.2023, 13, 7927.
Kravchenko, O.V.; Azarova, O.A.; Knight, D.D. Impact of a Thermally Stratified Energy Source Located in Front of a Pointed Cylinder Aerodynamic Model on the Pressure Signatures and PLdB Effect on the Ground. Appl. Sci. 2023, 13, 7927.
Abstract
The research is devoted to the problem of noise generation during flights of supersonic civil aircrafts. The effect of a thermally stratified energy source used to control the flow past a pointed cylinder aerodynamic models on the nearfield and ground pressure signatures, as well as on the perceived loudness in decibels (PLdB) on the ground is evaluated. The fields of parameters and the dynamics of the drag forces are studied for different values of temperature in the layers of the thermally stratified energy source and for different number of layers in it. It has been shown that when performing the flow control at freestream Mach numbers 1.5-2 using thermally stratified energy sources with the number of layers from 2.5 to 7.5 and rarefaction parameters in the layers from 0.15 to 0.3, no additional noise impact on the ground is introduced. Thus, the simulations showed that changing the surface pressure signature due to drag reduction does not necessarily imply a change in the PLdB on the ground.
Keywords
supersonic flow; bow shock wave; thermally stratified energy source; drag force control; pressure signature; noise generation; sonic boom
Subject
Engineering, Aerospace Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
