PPT-Effective Emissivity of Nonisothermal Isogrid for Spacecraft Radiator Applications

Seth Abramczyk November 19 th 2021 Abstract Accurate knowledge of the optical properties of spacecraft components especially external components is critical for proper spacecraft thermal design The effective emissivity of isogrid an array of equilateral triangular cavities is not well understood which poses a challenge for spacecraft thermal management In this thesis the effective emissivity of isogrid with a prescribed base temperature and nonisothermal walls is examined The temperature profile of the cavitys walls and the overall effective emissivity of the cavity are found using Thermal Desktop with Monte Carlo ray tracing The effective emissivitys dependence on the wall height wall thickness wall resistance and surface emissivity are examined The existence of a critical wall height and the contributing factors to this critical height are discussed Comparisons between isogrid and cavities with different base geometries are made A variable emissivity isogrid spacecraft radiator concept employing the cavity effect is proposed and mechanisms for achieving this are discussed. Bornmann Manufacturing is a family owned and operated business that has been serving the Philadelphia tri-state area for over 65 years. In the 1940’s, William (Bill) Bornmann Sr. worked as a welder in the Philadelphia Navy Yard. He was asked to design an enclosure for the cast iron radiators in the offices on the premises. It was then that he created the Bornmann radiator cover. A few years later, he took his craftsmanship and design to the 1300 block of Buttonwood St and started Bornmann Manufacturing. By: Emily Teske. Meteorology. Department of Marine and Environmental Systems. Florida Institute of Technology. Objective. Measure the Emissivity of Wet, Damp, and Dry sand. Compare these measured . emissivities. Jean-Luc . Moncet. P. Liang, J. Galantowicz, G. Uymin, A. Lipton, C. Prigent*, B. Hornbuckle**. Atmospheric and Environmental Research, . Inc.. *LERMA. **Iowa State University. First version of global monthly. Fuel Efficient . Engine . Package . Brittany . Borella. , Chris Jones, John Scanlon, Stanley . Fofano. , Taylor Hattori, and Evan See. Project Overview. Customer Needs. Customer Need #. Importance. Dr Mark Price . (. mcp2@star.kent.ac.uk. ) , . Prof Mark Burchell (convener), Prof Richard Holdaway (CCLRC), Dr Vicky Fitzgerald.. Spring 2011.. Dr. Mark Price. Room 103C . E-mail: . mcp2@star.kent.ac.uk. Jean-Luc . Moncet. P. Liang, J. Galantowicz, G. Uymin, A. Lipton, C. Prigent*, B. Hornbuckle**. Atmospheric and Environmental Research, . Inc.. *LERMA. **Iowa State University. First version of global monthly. Thermal Infrared . from IASI. AGU Fall Meeting, 14. th. -18. th. December, San Francisco, USA.. Email: diane.knappett@stfc.ac.uk. Diane Knappett, Richard . Siddans. , Brian . Kerridge. ,. Jane . Hurley and Alison Waterfall. Or Keeps it From. Getting Too Hot. The Big Picture. Automobile engines adapted to aircraft use generally are run a little harder for longer periods of time than in a car.. The engine installation in the cowling can be just as tight as in a car, or tighter.. Or Keeps it From. Getting Too Hot. The Big Picture. Automobile engines adapted to aircraft use generally are run a little harder for longer periods of time than in a car.. The engine installation in the cowling can be just as tight as in a car, or tighter.. Presented By. Deepak Patel. . NASA/ Goddard Space Flight Center. Thermal & Fluids Analysis Workshop. TFAWS 2011. August 15-19, 2011. NASA Langley Research Center. Newport News, VA. Hume . Peabody . Or Keeps it From. Getting Too Hot. The Big Picture. Automobile engines adapted to aircraft use generally are run a little harder for longer periods of time than in a car.. The engine installation in the cowling can be just as tight as in a car, or tighter.. February 9 , 2015 Program Code 47 0 47 0 - REF - 00184 Joint Polar Satellite System 1 (JPSS - 1 ) Spacecraft High Rate Data (HRD) to Direct Broadcast Stations (DBS) Radio Frequency (RF) Interface Co Before, you learned. • The motions of planets and other nearby objects are visible from Earth . • Light and other forms of radiation carry information about the universe. Now, you will learn. • How astronauts explore space near Earth . TFAWS 2022. September 6. th. -9. th. , 2022. Virtual Conference. TFAWS . Passive Thermal . Paper Session. An Advanced Thermal Radiator for Global Lunar Heat Rejection. Jodi Turk, Carlos Gomez and Greg Schunk.