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Isro’s reusable launch vehicle technology demonstrator (rlv-td) – joining the big boys club!!


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Isro’s reusable launch vehicle technology demonstrator (rlv-td) – joining the big boys club!!

  2. 2. INTRODUCTION  ISRO is developing fully Reusable Launch Vehicle (RLV) technology for two stage to orbit (TSTO) capability.  The first stage will be powered by a semi cryogenic winged booster capable of flying back and landing on a runway near the launch site like a conventional aircraft after burnout.  The second stage will be cryogenic. It will deliver the satellite into orbit, de-orbit and re- enter the atmosphere and parachute down to a soft landing on balloons.  The RLV has been conceived by ISRO as a space launch system that will significantly cut down launch cost from the present level of around $12,000 / kg.
  3. 3. ABOUT RLV-TD  As a first step towards developing TSTO capability based on RLVs, ISRO will flight test a Reusable Launch Vehicle - Technology Demonstrator (RLV-TD) that will serve as a flying test bed to evaluate various technologies viz., hypersonic flight, autonomous landing, powered cruise flight and hypersonic flight using air breathing propulsion.  ISRO displayed a scale model of the RLV-TD at Aero India 2009.  The RLV-TD will possess wings and tail fins, and will be launched atop a 9 ton solid booster called S-9, similar to the ones on the PSLV.  RLV-TD is reported to be 9m long, with its wing span also measuring 9m.
  4. 4. DESIGN APPROVAL On January 5, 2012, DNA reported that the National Review Committee had approved the design of the RLV-TD. An ISRO official said design-related issues have been addressed and presented to the National Review Committee and clearance obtained to go ahead to build the RLV-TD.
  5. 5. WIND TUNNEL TESTS ISRO has a hypersonic wind tunnel facility at VSSC, Trivandrum installed by Hind High Vacuum (HHV) Bangalore. The system comprises three Horton Spheres, each 16.3m dia. and 2200 cu m capacity.  The system has two parallel pumping trains, each with two mechanical booster pumps with pumping speed of 30,000 cu m / hr backed successively by a 14,000 cu m / hr and 7,000 cu m / hr booster pump and finally by three rotary piston pumps, each with a pumping speed of 1325 cu m / hr.
  6. 6. PHASED DEVELOPMENT  Reusable Launch Vehicle technology will be developed in phases through a series of trial flights.  The first in the series of trials is the hypersonic flight experiment (HEX) followed by the landing experiment (LEX), return flight experiment (REX) and scramjet propulsion experiment (SPEX).
  7. 7. HYPERSONIC FLIGHT EXPERIMENT (HEX) Flight testing will start with RLV-TD (HEX). During the mission, a booster rocket will take the RLV to a specific altitude and release it. The booster rocket will fall back into the sea. The lofted RLV will re-enter the atmosphere independently and be guided for a controlled landing in the sea. In the first trial-flight, the RLV will not be recovered from sea because it will not be cost- effective to do so. ISRO will instead use telemetry data on the re-entry, deceleration and return.
  8. 8. LANDING EXPERIMENT (LEX)  In the second phase RLV will be tested without its scramjet engine.  After burnout, the booster will separate and fall away, and the RLV-TD will go on to make an unpowered ascent.  The RLV-TD will then re-enter the atmosphere at hypersonic speed and use aerodynamic breaking to decelerate.  It will perform a range maneuver at 15-km, a 2g turn towards its launch site.  Once the TD reaches 0.8 M, it will light up a turbofan engine to cruise back to its launch site at 0.6M and make a horizontal landing on a runway.
  9. 9. OTHER EXPERIMENTS Return Flight Experiment (REX) - In this phase, the RLV-TD will be launched to orbit and then de-orbited for a landing on a runway. Scramjet Propulsion Experiment (SPEX) - Eventually, the RLV will be powered by an air breathing scram jet which is being developed under a separate project called Air Breathing Propulsion Project (ABPP).
  10. 10. DEVELOPMENT PROGRESS Major highlights of RLV-TD during the year include completion of major actions identified by the National Review Committee during the Integrated Technical Review (ITR) of hypersonic experimental flight (RLV-TD HEX-01). Mission analyses on the design of trajectory, autopilot and guidance have been completed. The Avionics Bay powering for the Avionics packages in the Technology Demonstrator Vehicle (TDV) was carried out through Checkout System and On-Board Checkout Computer (OBCC). The second phase of the full scale Flush Air Data System (FADS) model was successfully tested and validated at the Wind Tunnel Facility, IIT, Kanpur with modified algorithms and recalibrated sensors. Radar Altimeter along with antenna was also validated through a Balloon test at Tata Institute of Fundamental Research (TIFR), Hyderabad and the capability of the system has been demonstrated. Trial assembly of Thermal Protection System for qualifying the bonding procedure and trial assembly of Booster with Interstage and TDV have been completed. The realization of the flight hardware and its assembly and integration is in progress. The launch of RLV-TD HEX-01 mission is planned in 2014. ISRO has announced that it will test the RLV-TD in 2014.
  11. 11. REFERENCES
  12. 12. THANK YOU