Assessment of a hybrid RANS/LES simulation method and URANS method in depicting the unsteady motions of flow structures in a scramjet combustor

Han, Yiyu; He, Yaning; Tian, Ye; Zhong, Fang; Le, Jialing

doi:10.1016/j.ast.2017.11.003

Cited by 22 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, their wall plates may exhibit vibration problems under the action of supersonic airflow. Many system factors affect the vibration characteristics of wall plates, such as the dynamic pressure of the airflow, angle of the incoming airflow, support form of the structure, compression force of the mid-plane, structural damping, and material properties [7,8].…”

Section: Introductionmentioning

confidence: 99%

Effect of vibration in cooling channel on heat transfer of aviation kerosene flowing under different pressures

et al. 2023

View full text Add to dashboard Cite

In this study, experimental methods are used to investigate the effects of different vibration and pressure parameters on heat transfer performance are analyzed. The results show that at a subcritical pressure(0.1 Mpa), the external vibration begins to affect the heat transfer when the fuel passes the phase-change point and becomes gaseous.; at a near-critical pressure(3 Mpa), the external vibration deteriorates the heat transfer of fuel across the critical-temperature zone; at the supercritical pressure(5Mpa), the external vibration intensifies the heat transfer in the hot end of the channel only when the fuel is below the critical temperature and the internal wall is above the critical pressure. Combined with data analysis, it can be seen that the external vibration mainly acts on the temperature boundary layer of the fuel oil to affect the wall temperature and heat transfer coefficient.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of vibration in cooling channel on heat transfer of aviation kerosene flowing under different pressures

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In the fuel supply system, a differential pressure flow meter is generally used for flow calibration. However, this setup may cause unstable flow and interfere with the regulation of the fuel supply system [7]. In severe cases, it may cause high-temperature ablation of the engine wall, difficulty in fuel flow control, and vibration damage to the mechanical structure.…”

Section: Introductionmentioning

confidence: 99%

“…Although it generally has a thin-walled structure, it should be capable of withstanding substantial aerodynamic loads and aerodynamic thermal loads. Therefore, combustion oscillation is an important cause of wall vibration [16,17]. Wall vibration has a substantial influence on the flow characteristics of the fluid in the pipes, which can occasionally become unstable [18].…”

Section: Introductionmentioning

confidence: 99%

Study on influence of forced vibration of cooling channel on flow and heat transfer of hydrocarbon fuel at supercritical pressure

Chen

Han

et al. 2022

Therm sci

View full text Add to dashboard Cite

The cooling channel of a scramjet is the fundamental structure of the active thermal protection for an engine. Till now, studies have focused mainly on the steady-state flow and heat transfer process in the cooling channel. However, the vibration intensity of an engine increases sharply as the flight speed increases, because of which, the flow and heat exchange mechanisms based on the cooling channel under stable conditions cannot be applied under vibration. In this study, experimental methods are used to study the characteristics of the forced vibration of a cooling channel on the flow and heat transfer of hydrocarbon fuel at supercritical pressure. In addition, the influences of different vibration frequencies and vibration amplitudes on the flow and heat transfer are analyzed. The research results show that at supercritical pressure, when the fuel temperature is below the critical temperature and the inner wall temperature is above the critical temperature, external vibrations would enhance the heat transfer characteristics of the cooling channel. However, when the pressure and temperature are unstable, the forced vibration of the cooling channel would suppress the instability of temperature and pressure while strengthening the heat exchange.

show abstract

Experimental study on supersonic combustion fluctuation using thin-film thermocouple and time–frequency analysis

et al. 2021

View full text Add to dashboard Cite

Assessment of a hybrid RANS/LES simulation method and URANS method in depicting the unsteady motions of flow structures in a scramjet combustor

Cited by 22 publications

References 20 publications

Effect of vibration in cooling channel on heat transfer of aviation kerosene flowing under different pressures

Effect of vibration in cooling channel on heat transfer of aviation kerosene flowing under different pressures

Study on influence of forced vibration of cooling channel on flow and heat transfer of hydrocarbon fuel at supercritical pressure

Experimental study on supersonic combustion fluctuation using thin-film thermocouple and time–frequency analysis

Contact Info

Product

Resources

About