Numerical Investigation on Hydrogen-Fueled Scramjet Combustor with Parallel Strut Fuel Injector at a Flight Mach Number of 6

Pandey, Krishna Murari; Roga, Sukanta; Choubey, Gautam

doi:10.18869/acadpub.jafm.68.228.24082

Cited by 49 publications

(9 citation statements)

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“…These are (a) hybrid fin, (b) micropin fin, (c) rolling thin plate fin, and (d) hollow fin. These fin‐shaped fuel injection techniques can also be used in high‐speed air‐breathing engines, like, the Scramjet Engine 114‐117 …”

Section: Scope Of Further Researchmentioning

confidence: 99%

Improvement of heat transfer through fins: A brief review of recent developments

Maji¹,

Choubey

2020

Heat Trans

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Fins or extended surfaces are generally used in heat exchangers to enhance heat transfer between the main surface and ambient fluid. Various types of simple-shaped fins, namely, rectangular, square, annular, cylindrical, and tapered, have been used with different geometrical combinations. To satisfy industrial demand, different trials have also been carried out for designing optimized fins. The optimization of fins can be performed either by enhancing heat dissipation at an exact fin weight or by diminishing the weight of the fin by precise heat dissipation. Recently a notable amount of work on some typical fins, like, porous fins and perforated fins, has also been carried out. This paper presents a brief review on heat transfer enhancement using fins of different types considering variable thermophysical and geometric parameters, which will also be useful for future use of geometrical modifications of extended surfaces, based on the cost and availability of space.analytical approach, computational approach, experimental approach, perforated fin, porous fin | INTRODUCTIONAdvanced technologies need high-performance heat transfer equipment. Techniques for enhancing the heat transfer rate are classified into two categories: active and passive methods. In the design point of view, active methods are complex as they require some extraneous power input for necessary flow adjustments and to improve the heat transfer rate and thus applications are limited. On the other hand, passive methods require geometrical or surface adjustments to the flow passage by incorporating additional devices. Additionally, by interrupting or varying the existing flow behavior (except for extended surfaces); higher heat transfer coefficients are promoted through this method, which is also followed by an increase in the corresponding pressure drop. The amount of conduction, convection, and radiation of an object shows the amount of heat it transfers. The heat transfer rate is enhanced by increasing the temperature difference between the object and the environment or by enhancing the coefficient of convective heat transfer or by maximizing the surface area of the body. In some cases, it is not appropriate or cost effective to alter the first two options. Introducing a fin to a body, however, expands the surface area and sometimes this is a cost-effective solution for heat transfer problems. Extended surfaces or fins are illustrations of passive methods that are generally used in different industrial applications for the enhancement of heat transfer between the primary surface (heat sink) and the surrounding fluid. Currently reducing the cost and size of fins is the key target of the fin industry. This demand is generally met by the high-thermal-conductivity and costly metals used to fabricate finned surfaces. Many efforts have been made to construct optimized fins. (a) By changing the size and shape of the solid fin: Instead of a longitudinal rectangular solid fin, if the geometry of fin design is changed, the performance parameters and heat tr...

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Section: Scope Of Further Researchmentioning

confidence: 99%

Improvement of heat transfer through fins: A brief review of recent developments

Maji¹,

Choubey

2020

Heat Trans

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“…The numerical investigation of hydrogenfueled scramjet combustor with two types of strut flame holder having circular strut injector, for three angles of attack (Pandey et. al., 2016) shows different performance.…”

Section: Fig 5: the Schematic Of Cavity Shaped Combustormentioning

confidence: 99%

“…The ignition delay is observed for a different angle of attack. The shortest ignition delay is noted in the negative angle of attack, = -4 0 , (Pandey et. al., 2016), so the increase of temperature is also observed in the negative angle of attack, whereas the positive angle of attack shows most prolonged ignition delay.…”

Section: Fig 5: the Schematic Of Cavity Shaped Combustormentioning

confidence: 99%

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A Review of hyper mixers to enhance combustion efficiency in supersonic combustor

Ananthan¹,

Sekar²

2020

AJMT

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Supersonic mixing and combustion enhancement is primarily focused to increase the efficiency of scramjet engine. The research on a fuel injection system performance is widely developing today. In scramjet engine, the air and fuel mixing is improper due to the supersonic flow inside the combustor. The flame instabilization occurs due to less resident time of air which tends to affect the output efficiency and it leads to loss of fuel energy. Hence apart from the modern research studies on various fuel injection techniques inside the supersonic combustor, this study provides the idea of various alternating wedge designs to enhance the air and fuel mixture. Also reducing the consumption of fuel in the combustor gives a great impact in usage of fuel energy efficiently in the aviation field.

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“…Species transport modelling is taking more attention which gives similar results as in experimental data. Various modification has been proposed by numerous scientist and research scholar in the direction of improved mixing [11][12][13] by means of fuel injection strategies, 14 geometrical parameters [15][16][17][18] boundary conditions [19][20][21] and a lot more. Among three types of fuel injection strategy, parallel fuel injection [22][23][24] is only taking more attention and widely use.…”

Section: Introductionmentioning

confidence: 99%

Impact of parametric variation on combustion characteristics of hydrogen‐fueled strut based scramjet combustor at supersonic speed

2020

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Supersonic combustion ramjet engine is more fascinating among all the airbreathing engines. Due to its higher thrust to weight ratio, researchers are more interested to get the superior combustion performance at the optimum boundary conditions. The flow field characteristics and combustion performance have been analysed with the help of Ansys 14.0 software. Generic scramjet combustor of German Aerospace Center (DLR) has been taken into consideration for comparison purpose and off design analysis has been conducted to investigate and analyse the changes. Two dimensional compressible Reynolds Averaged Navier-Stokes (RANS) turbulence model has been opted with the finite-rate/eddy-dissipation reaction model. K-ε two equation turbulence model has been selected to reach up to reasonable accuracy. Validation of the present work has been done with the help of both non-reacting and reacting type data from open literature. To choose the appropriate meshing of the computational model three different types of mesh elements, that is, coarse, medium and fine has been analysed and also grid independence analysis is performed. The present article objective is to get optimum boundary condition by changing the incoming air temperature and pressure at constant Mach number to connect the bridge between incoming air temperature and pressure to the change in velocity throughout the combustion chamber. The detailed understanding and explanation have been done by varying the temperature range of incoming air because of its major impact on combustion performance. Nonetheless, a small variation of air pressure will also discuss to observe the parameters which majorly influence while doing performance analysis. At the end the Optimum boundary condition for the present computation work is observed to be at 833 K temperature with 115 299 Pa pressure.

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Numerical Investigation on Hydrogen-Fueled Scramjet Combustor with Parallel Strut Fuel Injector at a Flight Mach Number of 6

Cited by 49 publications

References 10 publications

Improvement of heat transfer through fins: A brief review of recent developments

Improvement of heat transfer through fins: A brief review of recent developments

A Review of hyper mixers to enhance combustion efficiency in supersonic combustor

Impact of parametric variation on combustion characteristics of hydrogen‐fueled strut based scramjet combustor at supersonic speed

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