A study on the performance characteristics of two-stream supersonic diffusers

Prabakar, S. Manoj; Panchabudhe, Lakhan M.; Muruganandam, T. M.; Sundararajan, T.

doi:10.1016/j.ast.2019.105470

Cited by 5 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, we assumed that the operating pressure was the most influential factor in terms of heat transfer to the wall surface. The heat flux was divided by P 0.8 0 based on Equation (8). Consequently, the scaled heat fluxes with respect to P 0 in the supersonic section are similar to each other as shown in Figure 16b (i.e., the heat flux of the supersonic flow to the wall surface is related proportionally to P 0.8 0 ).…”

Section: Heat Transfer Characteristics With Respect To Operating Pressurementioning

confidence: 90%

“…Some relatively simple correlations for the calculation of the gas-side heat transfer coefficient have been developed based on experience with turbulent boundary layers [22]. Therefore, we used the Nusselt number in Equation (8), which is generally applied when conducting heat transfer analysis in the design of rocket engines. Under normal circumstances, the heat transfer coefficient varies with the chamber pressure to the 0.8 power, so the following form has been widely used:…”

Section: Heat Transfer Characteristics With Respect To Operating Pressurementioning

confidence: 99%

“…Nu ≈ Re 0.8 Pr 0.34 (8) where Nu, Re, and Pr are the Nusselt, Reynolds, and Prandtl numbers, respectively. As presented in Table 2, the thermodynamic properties of the working fluid are similar.…”

Section: Heat Transfer Characteristics With Respect To Operating Pressurementioning

confidence: 99%

“…Lim et al numerically and experimentally studied the performances of STEDs based on the nozzle expansion ratio and second throat width [7]. Prabakar et al investigated the mixing of two supersonic streams in a supersonic exhaust diffuser using theoretical, numerical, and experimental approaches [8]. They evaluated the performance characteristics of the STED and CAED in a two-stream supersonic wind tunnel and the optimization of their operational and geometric parameters.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Study on the Flow and Heat Transfer Characteristics of a Second Throat Exhaust Diffuser According to Variations in Operating Pressure and Geometric Shape

Han

Kim

et al. 2021

Energies

View full text Add to dashboard Cite

A numerical study was conducted to investigate the flow and heat transfer characteristics of a supersonic second throat exhaust diffuser for high-altitude simulations. The numerical results were satisfactorily validated by the experimental results. A subscale diffuser using nitrogen was utilized to investigate starting pressure and pressure variation in the diffuser wall. Based on the validated numerical method, the flow and heat transfer characteristics of the diffuser using burnt gas were evaluated by changing operating pressure and geometric shape. During normal diffuser operation without cooling, high-temperature regions of over 3000 K appeared, particularly near the wall and in the diffuser diverging section. After cooling, the flow and pressure distribution characteristics did not differ significantly from those of the adiabatic condition, but the temperature in the subsonic flow section decreased by more than 1000 K. Furthermore, the tendency of the heat flux from the diffuser internal flow to the wall was similar to that of the pressure variations, and it increased with operating pressure. It was confirmed that the heat fluxes of the supersonic and subsonic flows in the diffuser were proportional to the operating pressure to the 0.8 and −1.7 power, respectively. In addition, in the second throat region after separation, the heat flux could be scaled to the Mach number ratio before and after the largest oblique shock wave because the largest shock train affected the heat flux of the diffuser wall.

show abstract

Section: Heat Transfer Characteristics With Respect To Operating Pressurementioning

confidence: 90%

Section: Heat Transfer Characteristics With Respect To Operating Pressurementioning

confidence: 99%

Section: Heat Transfer Characteristics With Respect To Operating Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Study on the Flow and Heat Transfer Characteristics of a Second Throat Exhaust Diffuser According to Variations in Operating Pressure and Geometric Shape

Han

Kim

et al. 2021

Energies

View full text Add to dashboard Cite

show abstract

Effect of inclined block on fuel mixing of multi hydrogen jets in scramjet engine

Gerdroodbary

Moradi

et al. 2020

Aerospace Science and Technology

View full text Add to dashboard Cite

Numerical simulation and experimental research on oscillation performance of disc-type jet oscillator

NUERMAIMAITI,

LIU,

YAN

et al. 2023

Chinese Journal of Aeronautics

View full text Add to dashboard Cite

A study on the performance characteristics of two-stream supersonic diffusers

Cited by 5 publications

References 28 publications

Numerical Study on the Flow and Heat Transfer Characteristics of a Second Throat Exhaust Diffuser According to Variations in Operating Pressure and Geometric Shape

Numerical Study on the Flow and Heat Transfer Characteristics of a Second Throat Exhaust Diffuser According to Variations in Operating Pressure and Geometric Shape

Effect of inclined block on fuel mixing of multi hydrogen jets in scramjet engine

Numerical simulation and experimental research on oscillation performance of disc-type jet oscillator

Contact Info

Product

Resources

About