Design and Analysis of Secondary Spike on Blunt Head

Sreekanth, N P; Akhil, J.; Nagaraja, S. R.

doi:10.17485/ijst/2016/v9i45/104649

Cited by 9 publications

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“…They have found that using twin conical spike reduces the heat flux by 42%. Sreekanth et.al [10] have studied the effect of secondary spike on reduction of drag and heat flux. The 3D model simulated is a blunt cone with 58-degree apex angle and nose radius 35mm.An additional 53mm cylindrical structure is created to visualize the shockwave fully.…”

Section: Literature Surveymentioning

confidence: 99%

Effect of Counter Flowing Jet on Heat Transfer and Drag in Hypersonic Re-entry Vehicle

Visakh

Akhil

Nagaraja

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. All the re-entry vehicles usually travel at hypersonic velocities, there are some design constraints pertaining to them such as aerodynamic drag and heat, which are mutually conflicting. A sharp edged slender body offers longer range and lesser drag but it causes higher aerodynamic heat. Generally, blunt shaped nose is used for the re-entry vehicles as it can disperse the accumulated heat to the surroundings better than sharp edged bodies. The current work focuses on reduction of aerodynamic heating by the introduction of a single jet injection on the stagnation point. Different jet angle configurations are used for the analysis by maintaining the angle of attack of the body constant. It is found that for body at 6-degree angle of attack the optimum jet angle is 9 degrees and the corresponding reduction in peak heat flux is 22.7% compared to the heat flux when the jet is at zero degrees and 33% compared to the case without jet.

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Section: Literature Surveymentioning

confidence: 99%

Effect of Counter Flowing Jet on Heat Transfer and Drag in Hypersonic Re-entry Vehicle

Visakh

Akhil

Nagaraja

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The drag coefficient was calculated by substituting measured values of velocity and acceleration into the equation of motion which were obtained by analyzing the motion using a highspeed camera and motion capture method. Sreekanth et al [14] suggested a secondary spiked body design, in order to ensure that the point of reattachment of the flow on the afterbody is farther away from the axis in the radial direction. This design was found to reduce the steady state drag of the secondary spiked body.…”

Section: Introductionmentioning

confidence: 99%

Effect on the drag coefficient of various spiked cylinders during buzz phenomenon subjected to hypersonic flows

Rajesh

Rakesh

2020

J Braz. Soc. Mech. Sci. Eng.

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Pulsation mode of transient flow behavior may occur in a violent manner in case of spiked cylinders depending on the geometry, type of spikes, and free stream conditions. Drastic pressure fluctuations near the face of the afterbody have been observed in most cases of pulsating flow mode and thus resulting in drastic variations in the coefficient of drag of the spiked body. The transient analysis of variations in C d with spike length for various spiked cylinders have been carried out in the current work. The variations in C d during one complete cycle as well as variations in time-averaged value of C d with increase in L/D ratios have been analyzed. These variations have been explained with respect to the localized pressure fluctuations, shift in foreshock-aftershock interaction region, effect of effective shielding, and increasing spike lengths. It was found that aerodisk spiked cylinder had the least time-averaged C d. The C d for various other spiked bodies has also been summarized over a range of feasible spike lengths and an optimum design of the spiked body in terms of the spike shape and L/D has also been suggested.

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Performance Characteristics of Asymmetric Body in Hypersonic Flow

Nithin

Kotebavi

2022

Lecture Notes in Mechanical Engineering

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Design and Analysis of Secondary Spike on Blunt Head

Cited by 9 publications

References 0 publications

Effect of Counter Flowing Jet on Heat Transfer and Drag in Hypersonic Re-entry Vehicle

Effect of Counter Flowing Jet on Heat Transfer and Drag in Hypersonic Re-entry Vehicle

Effect on the drag coefficient of various spiked cylinders during buzz phenomenon subjected to hypersonic flows

Performance Characteristics of Asymmetric Body in Hypersonic Flow

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