Velocity near-field of variable density turbulent jets

Numerical simulation of axisymmetric turbulent jets

“…Gharbi et al [10] reported results of numerical simulations of circular turbulent jets obtained by using a model including transport equations for all components of the Reynolds stress tensor and dissipation rate of the turbulent kinetic energy. The calculated results are shown to be consistent with the experimental data [9]. Piquet [11] performed a detailed analysis of data obtained in experimental and theoretical (including numerical) studies of such flows.…”

“…Possibly, this is the reason for different interpretations of the data obtained. Amielh et al [9] performed experiments to study the flow dynamics in the near field of turbulent jets of gases with different densities (non-self-similar regimes) in a co-flow, and the data obtained were compared with the results [1,8]. Laboratory measurements were performed at Re = 2.1 · 10 4 and x/D = 0-30.…”

Liquid-Propellant Rocket Engine Injector Dynamics and Combustion Processes at Supercritical Conditions

“…The half-widths based on both the velocity and density distributions expand as the ambient pressure increases. Figure 5.10a compares the velocity decays with the data obtained by Amielh et al (1996) for variable density turbulent jets at standard pressure. Their experimental conditions are listed in Table 5.4.…”

“…• N 2 into N a> simulation ■ N 2 into N 2 , Exp, (Chehroudi et al) * N 2 into He, Modeling (Chehroudi et al) Hussein et al (1993), Wygnanski and Fiedler (1967), and the variable density Helium and C0 2 jets of Amielh et al, (1996), Most of the experimental data were acquired from the far downstream (xlD lnJ > 40), except the two variable density ones, in which only the velocity profiles at xl D inj =20 are available. To be consistent, the velocity profiles of high-pressure 149 jets are obtained at the location of xlD inJ = 35, a position where the influence from outflow boundary could be excluded.…”

“…5.9), It is reasonable to see that both the axial velocity and Reynolds stress components are comparable with that of the lowpressure counterpart in the far-field. The centerline turbulent intensities are compared with the variable density jets data (Amielh et al, 1996) in Fig. 5.15.…”