1 / 26

COMBUSTION TEAM

COMBUSTION TEAM. Advisors: Dr. Darrell Guillaume Dr. Helen Boussalis Dr. Chivey Wu. Team Members: Marisol Avila Johanna Lopez Alonzo Perez. Agenda. Fundamentals Combustion Theory Combustion Chamber Design & Equipment Design CFD Analysis. Testing Capabilities Conclusion Reference

bedros
Télécharger la présentation

COMBUSTION TEAM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NASA Grant URC NCC NNX08BA44A COMBUSTION TEAM Advisors: Dr. Darrell Guillaume Dr. Helen Boussalis Dr. Chivey Wu Team Members: Marisol Avila Johanna Lopez Alonzo Perez

  2. NASA Grant URC NCC NNX08BA44A Agenda • Fundamentals Combustion Theory • Combustion Chamber Design & Equipment • Design CFD Analysis • Testing Capabilities • Conclusion • Reference • Timeline & Future Work

  3. NASA Grant URC NCC NNX08BA44A Process of Combustion Fuel Exhaust Oxidizer Heat Spark Bi-products of incomplete combustion and harmful to environment: • NOx • C • HxCy • CO

  4. NASA Grant URC NCC NNX08BA44A SPACE CENTER • Multidisciplinary Flight Dynamics and Controls Laboratory part of NASA Research Center • Housed in basement of C wing in Engineering Bldg. • 2005-2006: Simulation of combustion process & building of chamber began • 2007: Building of combustion chamber finalized & testing initiated • 2008-2009: Optimization of Jet Engine Combustion Chamber

  5. NASA Grant URC NCC NNX08BA44A Combustor Design Stepper Motors Combustor Flange Ball Screw Kit Combustor, Flange & Interior Window Frame Welded Assembly Interior Window Frame Rods & Ball Bearings Exterior Window Frames Swagelok Needle Valve Digital Flow Meter

  6. NASA Grant URC NCC NNX08BA44A Control Valve • Flow rate control of different fuels • Kerosene • Bio-Diesel • Ethanol • Methanol • Octane • Needle valve and digital fuel flow meter setup Fuel Needle Valve Digital Flow Meter

  7. NASA Grant URC NCC NNX08BA44A Volumetric Flow Rates

  8. NASA Grant URC NCC NNX08BA44A Purpose of Window • View shape and color of flame • Based on different color we can tell how well fuel combusts • Blue flame • Orange flame • Fuel atomization: How well fuel turns into fine mist • Fine spray helps combustion • Too fine spray causes increased particles – soot • Measure particle velocity • Measure flame temperature of different fuels as they combust • Safety

  9. NASA Grant URC NCC NNX08BA44A Interior Window Frame Details 2.5 x 5 inch viewing area Weld Stainless Steel 304L Frame to Stainless Steel 304L Chamber Can Weld Stainless Steel 304L Frame to Stainless Steel 304L Chamber Can

  10. NASA Grant URC NCC NNX08BA44A Exterior frame lip secures sapphire window to chamber Exterior Window Frame Detail

  11. NASA Grant URC NCC NNX08BA44A Velocity Profile of Final Window Design Combustion Flame Swirl Modeled Boundary Conditions Equivalence = 1 Swirl Number = 20 Mass Flow Inlet = 85 lbs/sec Interfering Window Non - Interfering Window Velocity Profile created in Solidworks

  12. NASA Grant URC NCC NNX08BA44A Window Material Selectionand Properties http://www.pegasus-glass.com http://www.rayotek.com/

  13. NASA Grant URC NCC NNX08BA44A Combustion Chamber Thermal Expansion ∆L = ∆L = Change in length Lo = Initial length αL = Coefficient of linear thermal expansion ∆T = Change in temperature Change in length Lo = Initial length αL = Coefficient of linear thermal expansion ∆T = Change in temperature

  14. NASA Grant URC NCC NNX08BA44A Gas Analyzer • Testo 350-S/ -XL Flue Gas Analyzer • Measures: - Carbon Dioxide (CO2) - Carbon Monoxide (CO) - Nitrogen Oxide (NO2) - Nitric Oxide (NO) • Temperature: -units: C / F • Velocity: -m/s & ft/min

  15. NASA Grant URC NCC NNX08BA44A Model-based Control for Combustion Acoustics Model Set Up Results Troubleshooting Conferences

  16. NASA Grant URC NCC NNX08BA44A Physical Model Quantify the Influence of Vorticity on Pressure, Sound, Emissions, Temperature, and Efficiency • Physical Model 45°

  17. NASA Grant URC NCC NNX08BA44A Equipment for Acoustic Testing • CAD M9 Professional Microphone • Conductor Cable • MV200 Analog Power Supply • Line Cord • Suspension Chock Mount • Lexicon Alpha Desktop Recording Studio – Lexalpha V • USB Powered • Cubase LE Software NASA Grant URC NCC NNX08BA44A

  18. NASA Grant URC NCC NNX08BA44A Equipment for Measuring Acoustic Response • Piezoelectric Accelerometer – Type 4384 (Brüel & Kjaer) • Testing and analysis • High sensitivity • High-frequency measurement • Mounted on object to be tested by means of threaded steel stud • Charge Amplifier – Type 2635 (Brüel & Kjaer) • For general measurement • Powered from internal batteries or DC power supply NASA Grant URC NCC NNX08BA44A

  19. NASA Grant URC NCC NNX08BA44A Equipment for Temperature Measurements • Data Logger Thermometer – HH309A (Ω Omega) • Four input thermometer & data logger • Windows-based software for display & saving of data • Temperature range: -200°C to 1370°C

  20. NASA Grant URC NCC NNX08BA44A Cubase Microphone LE 4 Data Swirl Number 100 Swirl Number 20 Swirl Number 200

  21. NASA Grant URC NCC NNX08BA44A Emissions Study Intensive testing More structured approach to measuring emissions

  22. Future Physical Modifications Incorporate Emissions Probe Stand once manufacturing is complete Install sapphire windows upon their arrival Install digital flow meter Calibrate needle valve Place high temperature gasket between diffuser and combustor Test complete set up Start research and work on laser set up to collect data through chamber viewing windows NASA Grant URC NCC NNX08BA44A

  23. NASA Grant URC NCC NNX08BA44A References Blake, W. K. “Mechanics of Flow-Induced Sound and Vibration” Blevins, R. “Flow-Induced Vibrations” Turns. H. “An Introduction to Combustion” Fox, R. & A. T. McDonald. “Introduction to Fluid Mechanics” Borman, G. L. & K. W. Ragland, “Combustion Engineering Anderson, J. D., “Compressible Flow” Heiser, W. H. & D. T. Pratt, “Hypersonic Airbreathing Propulsion” AIAA, “Scramjet Propulsion” Incropera, F. P. & DeWitt, D. P., “Introduction to Heat Transfer”

  24. NASA Grant URC NCC NNX08BA44A Project Timeline

  25. NASA Grant URC NCC NNX08BA44A Project Timeline

  26. NASA Grant URC NCC NNX08BA44A Acknowledgements • Space Center Students: • Shing Chi Chan • Nhan Doan • Sara Esparza • Sunny Karnani • Long Ly • Cesar Olmedo • Michael Tran

More Related