Flow Modulation at Micro-combustor Inlet

2021 ◽  
pp. 571-578
Author(s):  
Arees Qamareen ◽  
Shahood S. Alam ◽  
Mubashshir A. Ansari
Keyword(s):  
Flow Modulation ◽  
Micro Combustor

Effect of wall-fin location in a suddenly expanded micro-combustor

2021 ◽  
Author(s):  
Arees Qamareen ◽  
Shah Shahood Alam ◽  
Mubashshir Ahmad Ansari
Keyword(s):  
Micro Combustor

Numerical study of the geometrical parameters on CH4/air premixed combustion in heat recirculation micro-combustor

Fuel ◽  
2015 ◽  
Vol 159 ◽  
pp. 45-51 ◽  
Author(s):  
Yunfei Yan ◽  
Wenli Pan ◽  
Li Zhang ◽  
Weimin Tang ◽  
Yanrong Chen ◽  
...  
Keyword(s):  
Numerical Study ◽  
Premixed Combustion ◽  
Geometrical Parameters ◽  
Heat Recirculation ◽  
Micro Combustor

A flow modulation study of nickel–iron codeposition

1999 ◽  
Vol 44 (10) ◽  
pp. 1567-1576 ◽  
Author(s):  
Brett C. Baker ◽  
Alan C. West
Keyword(s):  
Flow Modulation ◽  
Nickel Iron

Effects analysis on the catalytic combustion and heat transfer performance enhancement of a non-premixed hydrogen/air micro combustor

Fuel ◽  
2022 ◽  
Vol 309 ◽  
pp. 122125
Author(s):  
E. Jiaqiang ◽  
Lei Cai ◽  
Jintao Li ◽  
Jiangjun Ding ◽  
Jingwei Chen ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Catalytic Combustion ◽  
Heat Transfer Performance ◽  
Performance Enhancement ◽  
Transfer Performance ◽  
Micro Combustor

Exploring Applicability of Acoustic Heat Transfer Enhancement Across Various Perturbation Elements

2021 ◽  
Vol 143 (3) ◽  
Author(s):  
Tapish Agarwal ◽  
Maximilian Stratmann ◽  
Simon Julius ◽  
Beni Cukurel
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Static Pressure ◽  
Pressure Fluctuations ◽  
Acoustic Excitation ◽  
Internal Cooling ◽  
Transfer Enhancement ◽  
Number Range ◽  
Flow Modulation ◽  
Spatially Resolved

Abstract The requirements of improved heat transfer performance on turbine surfaces and internal cooling passages drive the research into exploring new methods for efficiency enhancements. The addition of ribbed structures inside the cooling ducts has proven to be most practical, which increases heat transfer from surfaces to fluid flow at the cost of some pressure loss. Many active and passive methods have been proposed for enhancing the heat transfer, where acoustic excitation has been recently shown to be an effective option. Moreover, the existing pressure fluctuations due to rotor–stator interactions can also be utilized as a source of excitation. However, the sensitivity of the phenomenon to various flow and geometric parameters has not been fully characterized. The present study investigates various aspects of convective heat transfer enhancement and turbulent flow modulation caused by acoustic forcing on separating and reattaching flow over isolated rib obstacles. A parametric study is conducted; rib obstacles of various sizes and shapes (including rectangular, squared, triangular, and semi-cylindrical) are installed in a low-speed, fully turbulent wind tunnel, and measurements are taken at different velocities and excitation frequencies. Static pressure and spatially resolved surface temperature measurements are performed to quantify the ramifications of acoustic excitation on the wetted wall. Within the favorable Strouhal number range of 0.1–0.25, an optimum value of 0.16 is observed. It is shown that triangular ribs are more prone to acoustic heat transfer enhancement than rectangular or cylindrical perturbations. A linear correlation between static pressure recovery rate and acoustic heat transfer enhancement is observed, which is invariant to change in size/shape of the rib as well as flow and excitation parameters.

Effect of NH3-flow modulation on the morphological properties of nonpolar a-plane AlGaN epilayers

2021 ◽  
pp. 107045
Author(s):  
Abbas Nasir ◽  
Xiong Zhang ◽  
M. Zakria ◽  
Jin Zhang ◽  
Guohua Hu ◽  
...  
Keyword(s):  
Morphological Properties ◽  
Flow Modulation
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