L T A Activities@IITB-Amool
2 likes993 views
The document outlines research and development efforts on lighter-than-air systems, specifically focusing on airship design and optimization at the Indian Institute of Technology Bombay. It details completed tasks such as prototype development, feasibility studies for airships in India, and knowledge-based engineering approaches for airship design. Additionally, it covers various projects, including aerial ferry designs and aerostat systems, showcasing methodologies for structural and aerodynamic analysis.
L T A Activities@IITB-Amool
- 1. R&D of Lighter – than – air systems Amool A Raina Project Engineer Aerospace Engineering Department Indian Institute of Technology Bombay April 23rd , 2009 R&D @ LTA IITB
- 2. Research Work undertaken PADD Program Multi disciplinary Trans Brahmaputra Shape Optimization Airship Ferry E-Gift Aerostat Analysis of Airships Knowledge based Program using FSI tools Engineering Approach for Airship Design
- 3. Initial review and Study Projects
- 4. Program on Airship Design & Development PADD
- 5. Program on Airship Design & Development Establish Feasibility Operation, Design & Development of Airships in India Promote Usage Multiple roles; Pax/Cargo, CasEvac, Tourism, ……… Develop Technology Base Enhance existing expertise in Parachutes & Aerostats Explore avenues of Joint Development National & Global Partners Private Sector participation
- 6. Tasks Completed in PADD Project Definition Report for Development of Demo airship & PaxCargo Airship Payload = 100 kg & 1500 kg @ Hot (ISA+15) and High (3500 m) conditions Operation at lower altitudes to be explored Establishing feasibility of leasing a few airships
- 7. Pax/ Cargo Airship Prototype Models Demo Airship Demo Airship Suspension car
- 8. Design, Fabrication & Testing of Remotely Controlled Airships As a part of ongoing PADD Project
- 9. Micro Airship Volume = 6.8 m3 Payload = ~ 1 kg Max. Speed = 25 km/h Endurance = 15 min with 200 ml fuel No. of Flight days = 4 at IIT Gymkhana
- 10. Mini Airship Volume = 8.64 m3 Payload = ~3.0 kg Max. Speed = 36 kmph Endurance = 15 mins with 300 ml fuel No. of Flight days = 6 at Pune, Bangalore, Coimbatore
- 11. Shape Optimization of Aerostat Envelopes Sponsored by ADRDE, Agra
- 12. Multi disciplinary Shape Optimization Axis-symmetric Bodies of Revolution with application to airship and aerostat envelopes Three Disciplines Aerodynamics Structures Manufacturability 20th December
- 13. Results of Initial studies GNVR Least Drag Least Surface Least Stress Overall Best Profile 20th December
- 14. Core projects undertaken and completed
- 15. E- Gift Aerostat Design Project Sponsored by One World South Asia 20th December 2007
- 16. Schematic of Aerostat Communication System Aerostat Omni Directional Base Antenna 10km 50-100m Client antenna PoE Cable Router Board Winch with Power Supply LTA 20th December
- 17. Envelope Profile Profile Aerostat Profile with Petal and Fin Fin Geometry Single Petal 12.00 Single Petal Bottom Petal Weld Margin 10.00 8.00 Radius (m) 6.00 4.00 2.00 0.00 0.00 2.00 4.00 6.00 8.00 10.00 12.00 Length (m)
- 18. Tether Profile under wind loading 120.00 100.00 15 m/s 10 m/s 5 m/s 80.00 Height (m) 60.00 40.00 20.00 0.00 0.00 20.00 40.00 60.00 80.00 100.00 120.00 Blowby (m)
- 19. Fin Geometry 4.000 3.500 NACA 0018 Root NACA 0018 Tip Fin Elevation 3.000 Spar1 Spar 2 Spar 3 Spar 4 2.500 Spar 5 Spar 6 Spar 7 Spar 8 2.000 Spar 9 Spar 10 Spar 11 Spar 12 1.500 1.000 0.500 0.000 0.000 0.500 1.000 1.500 2.000 2.500 3.000 3.500 4.000 -0.500
- 20. Envelope and Fin Fabrication 20th December
- 21. Envelope Fabrication Techniques 20th December Master Template & Fabrication of Envelope
- 22. Fin Fabrication Rib Fabrication 20th December
- 23. Field Trials May 2007 August 2007 BATU, Raigarh GCP, Pune
- 24. Trans Brahmaputra Aerial Ferry Sponsored by DSIR 20th December
- 25. The Problem Possible airship ferry between Jorhat to North Lakhimpur reducing a travel of around 300 km by road to just 40 km 20th December
- 26. Tether & Winch Propelled Captive-HAB CAPTIVE HAB River bank TETHER / CABLES River bank MOTORIZED WINCHES 20th December
- 27. Knowledge based Engineering Approach for Airship Design
- 28. Knowledge Based Engineering (KBE) KBE is defined as engineering on the basis of electronic knowledge models. Knowledge models can be imported or stored enabling engineers to create designs on the basis of the knowledge in such models Highly adaptive to various design problems. Makes the design process highly iterative in nature.
- 29. KBE Approach for Airship Design Specific methodology is developed based on High Level Primitives (HLP). In case of an Airship the HLP’s consist of fully parametric models of the various segments of an airship.
- 30. KBE Approach Cont…. Based on the above inputs the volume and payload requirements are then calculated. Now, by changing a few input dimensions the Airship can be customised to customer’s needs of ‘Payload Requirements’
- 31. A typical Output from KBE Approach 17th April 2008 R&D @ LTA IITB - PPT For IITM
- 32. Conceptual study of unmanned high altitude aerial platforms • For scientific research by SASE • Applications • Real-time monitoring of avalanche parameters at the upper Himalayas • Observation of work-in-progress at the tunnel
- 33. Design of an aerostat for aerial observation at Dhundi Mandate Conceptual design and sizing of an aerostat meeting SASE’s operational requirements Generate documents and fabrication plans using which the aerostat can be fabricated by an industry partner decided by SASE Scaled prototype of the system to be fabricated and tested through a field trial by an industry partner decided by SASE
- 34. Analysis of Airships using FSI Tools (Project Mentored by me)
- 35. Fluid Structure Interaction - FSI FSI refers to problem solving using equations which govern the motion of fluid and structure particles during their interaction. Various Methodologies used are: FSI Modeling Models Fully Coupled Model Loosely Coupled Model Closely Coupled Mode ALE (Arbitrary Lagrangian Eulerian) IFEM (Immersed Finite Element Method) Fluid domain assumptions Solid domain assumptions The overlapping domain FD (Fictitious Domain) Method Fluid and Structure Coupling Mechanisms
- 36. Analysis of Airships using FSI Tools Consists of three Stages: Stage 1: Structural Modeling of Airship Body using FEM package called ABAQUS Stage 2 Generation of Aerodynamic model using VSAERO Stage 3 Coupling of VSAERO and ABAQUS models
- 37. This presentation showcased my work at IIT Bombay carried out by me from 2007-2008 If interested, please contact: amoolraina@gmail.com 20th December 2007