R&D of Lighter – than – air systems
                                Amool A Raina
                                Project ...
Research Work undertaken




PADD Program       Multi disciplinary     Trans Brahmaputra
                  Shape Optimizat...
Initial review and Study Projects
Program on Airship Design & Development

                PADD
Program on Airship Design & Development
   Establish Feasibility
       Operation, Design & Development of Airships in I...
Tasks Completed in PADD

   Project Definition Report for Development of
   Demo airship & PaxCargo Airship
       Payl...
Pax/ Cargo
                          Airship


       Prototype Models




Demo Airship




                              ...
Design, Fabrication & Testing of Remotely
           Controlled Airships


       As a part of ongoing PADD Project
Micro Airship

Volume = 6.8 m3
Payload = ~ 1 kg
Max. Speed = 25 km/h
Endurance = 15 min with 200 ml fuel
No. of Flight day...
Mini Airship




Volume = 8.64 m3
Payload = ~3.0 kg
Max. Speed = 36 kmph
Endurance = 15 mins with 300
ml fuel
No. of Fligh...
Shape Optimization of Aerostat
Envelopes
         Sponsored by ADRDE, Agra
Multi disciplinary Shape Optimization
          Axis-symmetric Bodies of
           Revolution with application to
      ...
Results of Initial studies

                       GNVR

                      Least Drag


                    Least Surf...
Core projects undertaken and
          completed
E- Gift Aerostat Design Project

         Sponsored by One World South Asia




20th December
2007
Schematic of Aerostat Communication
                              System
                                              Aer...
Envelope Profile
                                                                              Profile
                   ...
Tether Profile under wind loading
    120.00


    100.00                                                           15 m/s...
Fin Geometry
4.000


3.500
                                                             NACA 0018 Root
                   ...
Envelope and Fin Fabrication




20th December
Envelope Fabrication Techniques




20th December   Master Template & Fabrication of Envelope
Fin Fabrication




                       Rib
                       Fabrication




20th December
Field Trials

   May 2007               August 2007
       BATU, Raigarh          GCP, Pune
Trans Brahmaputra Aerial Ferry
                Sponsored by DSIR




20th December
The Problem




       Possible airship ferry between Jorhat to North Lakhimpur reducing a travel
                        ...
Tether & Winch Propelled Captive-HAB
                                CAPTIVE HAB                   River bank




        ...
Knowledge based Engineering Approach
         for Airship Design
Knowledge Based Engineering
            (KBE)
 KBE is defined as engineering on the basis of electronic

knowledge models...
KBE Approach for Airship Design
 Specific methodology is developed based on High Level
Primitives (HLP).




In case of ...
KBE Approach Cont….

Based on the above inputs the volume and payload requirements are
then calculated.




 Now, by cha...
A typical Output from KBE
                           Approach




17th April 2008            R&D @ LTA IITB - PPT For IITM
Conceptual study of unmanned
     high altitude aerial platforms
• For scientific research by SASE
• Applications
  • Real...
Design of an aerostat for aerial
        observation at Dhundi
   Mandate
       Conceptual design and sizing of an aero...
Analysis of Airships using FSI Tools
     (Project Mentored by me)
Fluid Structure Interaction - FSI
 FSI refers to problem solving using equations which govern the
motion of fluid and str...
Analysis of Airships using FSI Tools
Consists of three Stages:
Stage 1:
   Structural Modeling of Airship Body using FE...
This presentation showcased my work at IIT
            Bombay carried out by me from 2007-2008


                   If int...
Upcoming SlideShare
Loading in...5
×

L T A Activities@IITB-Amool

1,511

Published on

This presentation showcases the research work carried out by me under the able guidance of Dr. Rajkumar S. Pant at the Lighter-than-Air laboratory at IIT Bombay

1 Comment
1 Like
Statistics
Notes
No Downloads
Views
Total Views
1,511
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
0
Comments
1
Likes
1
Embeds 0
No embeds

No notes for slide

L T A Activities@IITB-Amool

  1. 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. 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. 3. Initial review and Study Projects
  4. 4. Program on Airship Design & Development PADD
  5. 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. 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. 7. Pax/ Cargo Airship Prototype Models Demo Airship Demo Airship Suspension car
  8. 8. Design, Fabrication & Testing of Remotely Controlled Airships As a part of ongoing PADD Project
  9. 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. 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. 11. Shape Optimization of Aerostat Envelopes Sponsored by ADRDE, Agra
  12. 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. 13. Results of Initial studies GNVR Least Drag Least Surface Least Stress Overall Best Profile 20th December
  14. 14. Core projects undertaken and completed
  15. 15. E- Gift Aerostat Design Project Sponsored by One World South Asia 20th December 2007
  16. 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. 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. 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. 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. 20. Envelope and Fin Fabrication 20th December
  21. 21. Envelope Fabrication Techniques 20th December Master Template & Fabrication of Envelope
  22. 22. Fin Fabrication Rib Fabrication 20th December
  23. 23. Field Trials  May 2007  August 2007  BATU, Raigarh  GCP, Pune
  24. 24. Trans Brahmaputra Aerial Ferry Sponsored by DSIR 20th December
  25. 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. 26. Tether & Winch Propelled Captive-HAB CAPTIVE HAB River bank TETHER / CABLES River bank MOTORIZED WINCHES 20th December
  27. 27. Knowledge based Engineering Approach for Airship Design
  28. 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. 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. 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. 31. A typical Output from KBE Approach 17th April 2008 R&D @ LTA IITB - PPT For IITM
  32. 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. 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. 34. Analysis of Airships using FSI Tools (Project Mentored by me)
  35. 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. 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. 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

×