This first aerodynamic-aero-acoustic chaining, created with an exchange surface crossed by a turbulent flow, opens the way to future complete aero-acoustic computations for configurations that are today impossible using non- coupled CFD(* ComputationalFluidDynamics) and CAA:* see below. CFD- ComputationalFluidDynamics
"Up to now we have had no other way of characterizing this shock wave than by firing up reduced scale thrusters", says Denis Gély, head of" the Aeroacoustic" research unit in Onera's ComputationalFluidDynamics and Aeroacoustic Department. But, when we perform tests at reduced scale, we can not simulate the time scales related to the intrinsic characteristics of the solid fuel in combustion and it is difficult to play with the time of pressure increase
"There are two main approaches to taking turbulence into account: statistical calculations and direct calculations", explains Ivan Mary, researcher in the ComputationalFluidDynamics and Aeroacoustics Department at Onera. In statistical methods, the average values for flow and the overall intensity of the fluctuations are calculated without including any information on the frequency with which they happen