GTRE SETS UP ENGINE CASING CONTAINMENT FACILITY
The Gas Turbine Research Establishment (GTRE), Bangalore, has set up a vertical spin facility using a Harbour Stockwell Air Turbine to prove the containment capability of the engine casings. The fan, compressor and turbine casings of Kaveri engine are designed to contain the blade masses when they are released from the disc assembly to avoid catastrophic secondary damages to both, engine and aircraft. To validate this design prediction, tests are conducted where blade aerofoils are released at predetermined rotor speeds in a test facility .
The containment facility consists of a bladed rotor assembly, a casing for containment test, a vacuum chamber, and a reinforced spin chamber. This facility can be used to spin single disc assemblies of Kaveri engine for conducting blade release tests. The blade release can be achieved by weakening the aerofoil at the root section. A successful test has been conducted at GTRE to demonstrate the capability at around 10,000 rpm by releasing I stage rotor blade to a stainless steel casing. More tests with engine standard casings are planned to prove their containment capability .
FLOWER SHOW - 2000
The Institute of Armament Technology (IAT), Pune bagged 55 prizes at the prestigious 35th Annual Flower and Vegetable Show conducted by Poona Women's Council, during 23-24 September 2000. IAT won total of 22 first, 17 second and 12 third prizes and 4 trophies in different categories of gARDEns, lawns, cut flowers, potted plants, vegetables and fruits. IAT also organised its own annual gARDEn, lawn competition, and flower exhibition for the residents of IAT campus, during 4-5 October 2000. Smt Sathyawathi Mani, wife of Prof GS Mani, Director & Dean, IAT, inaugurated the show and gave away the prizes.
DESIGN OF SMART ANTENNA ORIENTATION SYSTEM PROOF-OF-CONCEPT
Accurate orientation of antenna constitutes a significant advancement in the overall performance of an airborne radar .The isolation of antenna movement from the aircraft rotations, to a high level of precision is made possible by the use of smart technology actuators. Terfenol'-D, a magnetostrictive material that can be expanded or contracted very precisely by applying the required magnetic field, has been the subject of recent actuator design studies for smart structure application. The goal of this work was to study the feasibility of using Terfenol-D magnetostrictive actuators for stabilisation of antenna. As a step towards this goal, the Centre for Airborne Systems (CABS), Bangalore, conceived a single degree of freedom antenna model, designed it and carried out experiments to demonstrate the pointing accuracy attainable in pitching movement of the antenna. The studies have indicated that the required antenna positioning could be achieved with Terfenol-D actuators by proper selection of various design parameters.
Dr I Gurrappa, Sci D, Defence Metallurgical Research Laboratory (DMRL), Hyderabad, has been awARDEd the Best Paper Presentation Award in the National Seminar on Environmental awareness, Education and Management for Sustainable Rural Development organised by the SV University , Tirupati, during 24-26 August 2000.