Experimental investigation of drag reduction by forward facing high speed gas jet for a large angle blunt cone at Mach 8
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Citations
Experimental investigation on drag and heat flux reduction in supersonic/hypersonic flows: A survey
A survey of drag and heat reduction in supersonic flows by a counterflowing jet and its combinations
A study of performance parameters on drag and heat flux reduction efficiency of combinational novel cavity and opposing jet concept in hypersonic flows
Forebody shock control devices for drag and aero-heating reduction: A comprehensive survey with a practical perspective
Drag and heat reduction mechanism of the porous opposing jet for variable blunt hypersonic vehicles
References
Experimental investigation of self-induced thermocapillary convection for an evaporating meniscus in capillary tubes using micro-PIV
Experimental Investigations of Hypersonic Flow over Highly Blunted Cones with Aerospikes
Counterflow drag reduction by supersonic jet for a blunt body in hypersonic flow
E®ect of pressure ratio on aerodynamic heating reduction due to opposing jet
Film cooling effectiveness on a large angle blunt cone flying at hypersonic speed
Related Papers (5)
Experimental Study on Thermal Protection System by Opposing Jet in Supersonic Flow
Counterflow drag reduction by supersonic jet for a blunt body in hypersonic flow
Frequently Asked Questions (10)
Q2. What are the future works mentioned in the paper "Experimental investigation of drag reduction by forward facing high speed gas jet for a large angle blunt cone at mach 8" ?
This paper is dedicated to Dr P R Viswanath for his contributions to experimental research in aerodynamics.
Q3. What is the effect of the opposing jet on the bow?
The opposing jet interacts with the oncoming hypersonic flow causing the bow shock wave in front of the blunt model to stand away from the surface which results in the reduction of aerodynamic drag (Balla Venukumar et al 2006).
Q4. Why is the hypersonic vehicle preferred for enhanced aerodynamic drag?
It is well known that in order to address the severe heating problems encountered during the atmospheric flight of hypersonic vehicles, large-angle blunt-cone configurations are preferred at the cost of enhanced aerodynamic drag, due to the presence of the nearly normal standing shock wave in front of the vehicle.
Q5. What is the way to reduce aerodynamic drag?
Using a forward-facing spike is an effective means of reducing the aerodynamic drag for high-speed flight vehicles (Menezes et al 2003).
Q6. How is the drag reduction performed in the HST2 shock tunnel?
Drag reduction by counterflowing supersonic jet for a 60◦ apex angle blunt cone is investigated in the HST2 shock tunnel at a flow Mach number of 8.
Q7. How long before the hypersonic flow is established?
in order to synchronize the counterflowing supersonic jet from the stagnation point of the test model with the arrival of the hypersonic flow in the test section, it is essential to actuate the solenoid valve about 15 ms before the establishment of hypersonic flow in the test section.
Q8. How long is the time interval between the bursting of the metallic diaphragm and?
It is found that the time interval between the bursting of the metallic diaphragm and the arrival of the test flow in the test section is about 15 ms.
Q9. How have the authors been investigating these techniques in recent years?
The authors have been investigating these techniques experimentally in recent years in the hypersonic shock tunnel HST2 of the Indian Institute of Science, Bangalore, numerically using the CFX TASCFlow code.
Q10. What are some of the techniques used to reduce the drag of hypersonic vehicles?
Some of these techniques include the use of aerospikes with different aerodiscs (Menezes et al 2003), gas injection at the stagnation region (Sahoo et al 2005), multi-step base design (Menezes et al 2005) and energy deposition into the flow (Satheesh & Jagadeesh 2005).