The Indian Institute of Technology Bombay is organising an Institute Lecture on Monday, October 19, 2020. The details of the lecture are given below:
Title : “The recent flight demonstration of hypersonic air-breathing cruise vehicle by India”
Speaker : Prof. Debasis Chakraborty, Department of Aerospace Engineering, IIT Bombay
Date : October 19, 2020 | Time : 3.00 pm
Abstract: Starting with the intense determination of the two brothers Orvile and Wilbur Wright at Kitty Hawk, North Carolina, and their success, the aspiration of flying at higher and higher speed in the atmosphere has led the mankind to a position where it is possible to conceive of aircrafts flying at speeds more than few times that of sound in air. When the flight is in hypersonic regime (M∞ >5.0), the burning of fuel must occur at supersonic speeds inside the combustor to allow the possibility of heat addition and minimise the total pressure loss and so, thrust loss. In turn, this allows propulsive efficiency of the hypersonic systems to be brought up to meaningful values and also contribute to reduced vehicle size and weight. The success of efficient design of such a transatmospheric hypersonic vehicles depends largely on the proper choice of the propulsion system which is capable of producing large thrust, demanded by the system. This type of vehicle uses supersonic combustion ramjet (scramjet) propulsion system.
The development of hypersonic air-breathing cruise vehicle has tremendous applications in high-speed transport, space access, national defence, etc. It is attractive for military operations and can provide significant payoff for offensive strike against time critical, hardened, deeply buried and heavily defended targets due to its longer range, shorter response time and enhanced effectiveness. Its reduced tracking by ground based radars compresses enemy's decision-making window, effectively enabling the hypersonic attacker to get inside an adversary's command, control, and battle management cycle.
Although, various countries including USA, Russia, China, UK, France and India are in the race to develop hypersonic airbreathing cruise vehicles; only a few practical flight tests of these vehicles have been conducted worldwide. Extensive R&D efforts are continuing for the design and testing of scramjet combustors for hypersonic vehicles. The flight trial of hypersonic air-breathing cruise vehicle (X-51) by USA for 210 sec duration is close to hypersonic weaponization program. Russia and China are also claiming the successful demonstration of hypersonic air breathing cruise missile; but no information is available in the open literature. Recently, on September 7, DRDO, India has successfully test flown a vehicle integrated hydrocarbon fueled scramjet engine (cruise vehicle) in an autonomous mode. The cruise vehicle is put atop a solid rocket booster (launch vehicle) and carried to 32 Km altitude at Mach 6 conditions. The heat shield fairings which protected the cruise vehicle from aerodynamic heating during ascent phase were separated and the hydrocarbon fueled scramjet engine was ignited. The vehicle flown in power-on condition for 24 seconds before plunging into the sea. This maiden flight demonstration has proved many complex technologies and design tools for the development of hypersonic air breathing vehicles and put India in the league of the few advanced nations which possesses this complex technology.
About the speaker: Prof. Debasis Chakraborty has worked extensively for more than three decades in hypersonic technologies in both VSSC and DRDL and contributed very significantly in this development effort. In his lecture he will present the global scenario of hypersonic technology and highlight the role of simulation techniques in realizing this complex technology.
Prof. Debasis Chakraborty has worked for 35 years in VSSC/ISRO and DRDL/DRDO on many practical aerodynamics and propulsion design problems pertaining to ISRO's satellite launch vehicles and DRDO's strategic and tactical missiles. He has developed number of industry standard compressible CFD codes (RANS and LES) for aerodynamic and propulsion characterization of different kind of aerospace vehicles. His contributions in CFD simulations of external and internal flows has enabled the designers to take some standalone design decision based on numerical results without any experimental testing. After superannuation, he has joined Aerospace Engineering department in IIT, Bombay and taken over as director of Centre of Propulsion Technology (CoPT)- a DRDO initiative for directed research in advanced propulsion technology. For nearly two decades he has worked on various critical technologies for Hypersonic Technology Demonstrator Vehicle (HSTDV), occupied many responsible positions in the projects and contributed significantly in its successful flight trial. He has published many papers (~240) in reputed international journals and conferences. He is the fellow of many prestigious professional bodies including Indian National Academy of Engineering, Telangana Academy of Science, Institute of Engineers etc. and received many awards including DRDO scientist of the year, DRDO award for Best innovation/futuristic Development, Technology Group award etc.. He is the review committee member of many national programs and member of editorial board of many aerospace journals. His research interest includes Aerodynamics, Propulsion, CFD (RANS, LES, Grid free methods), Combustion, High speed reacting flows, modelling of turbulence – chemistry interaction, unsteady flows etc.