Design of a vehicle based system to prevent ozone loss
Reduced quantities of ozone in the atmosphere allow greater levels of ultraviolet light (UV) radiation to reach the earth's surface. This is known to cause skin cancer and mutations. Chlorine liberated from Chlorofluorocarbons (CFC's) and natural sources initiate the destruction of stratos...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19940020006 2023-05-15T14:04:38+02:00 Design of a vehicle based system to prevent ozone loss Lynn, Sean R. Howerton, Everett B. Hreinsson, G. Tischler, Dayna S. Rogers, Claiborne Bunker, Deborah Wrona, Daniel J. Palmer, Matthew E. Hesbach, Thomas D., Jr. Mistr, E. Kirk Unclassified, Unlimited, Publicly available Jul 28, 1993 application/pdf http://hdl.handle.net/2060/19940020006 unknown Document ID: 19940020006 Accession ID: 94N24479 http://hdl.handle.net/2060/19940020006 No Copyright CASI AIRCRAFT DESIGN TESTING AND PERFORMANCE NASA-CR-195498 NAS 1.26:195498 1993 ftnasantrs 2019-07-21T08:21:49Z Reduced quantities of ozone in the atmosphere allow greater levels of ultraviolet light (UV) radiation to reach the earth's surface. This is known to cause skin cancer and mutations. Chlorine liberated from Chlorofluorocarbons (CFC's) and natural sources initiate the destruction of stratospheric ozone through a free radical chain reaction. The project goals are to understand the processes which contribute to stratospheric ozone loss, examine ways to prevent ozone loss, and design a vehicle-based system to carry out the prevention scheme. The 1992/1993 design objectives were to accomplish the first two goals and define the requirements for an implementation vehicle to be designed in detail starting next year. Many different ozone intervention schemes have been proposed though few have been researched and none have been tested. A scheme proposed by R.J. Cicerone, Scott Elliot and R.P.Turco late in 1991 was selected because of its research support and economic feasibility. This scheme uses hydrocarbon injected into the Antarctic ozone hole to form stable compounds with free chlorine, thus reducing ozone depletion. Because most polar ozone depletion takes place during a 3-4 week period each year, the hydrocarbon must be injected during this time window. A study of the hydrocarbon injection requirements determined that 100 aircraft traveling Mach 2.4 at a maximum altitude of 66,000 ft. would provide the most economic approach to preventing ozone loss. Each aircraft would require an 8,000 nm. range and be able to carry 35,000 lbs. of propane. The propane would be stored in a three-tank high pressure system. Missions would be based from airport regions located in South America and Australia. To best provide the requirements of mission analysis, an aircraft with L/D(sub cruise) = 10.5, SFC = 0.65 (the faculty advisor suggested that this number is too low) and a 250,000 lb TOGW was selected as a baseline. Modularity and multi-role functionality were selected to be key design features. Modularity provides ease of turnaround for the down-time critical mission. Multi-role functionality allows the aircraft to be used beyond its design mission, perhaps as an High Speed Civil Transport (HSCT) or for high altitude research. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic Elliot ENVELOPE(166.533,166.533,-70.883,-70.883) The Antarctic |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
AIRCRAFT DESIGN TESTING AND PERFORMANCE |
spellingShingle |
AIRCRAFT DESIGN TESTING AND PERFORMANCE Lynn, Sean R. Howerton, Everett B. Hreinsson, G. Tischler, Dayna S. Rogers, Claiborne Bunker, Deborah Wrona, Daniel J. Palmer, Matthew E. Hesbach, Thomas D., Jr. Mistr, E. Kirk Design of a vehicle based system to prevent ozone loss |
topic_facet |
AIRCRAFT DESIGN TESTING AND PERFORMANCE |
description |
Reduced quantities of ozone in the atmosphere allow greater levels of ultraviolet light (UV) radiation to reach the earth's surface. This is known to cause skin cancer and mutations. Chlorine liberated from Chlorofluorocarbons (CFC's) and natural sources initiate the destruction of stratospheric ozone through a free radical chain reaction. The project goals are to understand the processes which contribute to stratospheric ozone loss, examine ways to prevent ozone loss, and design a vehicle-based system to carry out the prevention scheme. The 1992/1993 design objectives were to accomplish the first two goals and define the requirements for an implementation vehicle to be designed in detail starting next year. Many different ozone intervention schemes have been proposed though few have been researched and none have been tested. A scheme proposed by R.J. Cicerone, Scott Elliot and R.P.Turco late in 1991 was selected because of its research support and economic feasibility. This scheme uses hydrocarbon injected into the Antarctic ozone hole to form stable compounds with free chlorine, thus reducing ozone depletion. Because most polar ozone depletion takes place during a 3-4 week period each year, the hydrocarbon must be injected during this time window. A study of the hydrocarbon injection requirements determined that 100 aircraft traveling Mach 2.4 at a maximum altitude of 66,000 ft. would provide the most economic approach to preventing ozone loss. Each aircraft would require an 8,000 nm. range and be able to carry 35,000 lbs. of propane. The propane would be stored in a three-tank high pressure system. Missions would be based from airport regions located in South America and Australia. To best provide the requirements of mission analysis, an aircraft with L/D(sub cruise) = 10.5, SFC = 0.65 (the faculty advisor suggested that this number is too low) and a 250,000 lb TOGW was selected as a baseline. Modularity and multi-role functionality were selected to be key design features. Modularity provides ease of turnaround for the down-time critical mission. Multi-role functionality allows the aircraft to be used beyond its design mission, perhaps as an High Speed Civil Transport (HSCT) or for high altitude research. |
format |
Other/Unknown Material |
author |
Lynn, Sean R. Howerton, Everett B. Hreinsson, G. Tischler, Dayna S. Rogers, Claiborne Bunker, Deborah Wrona, Daniel J. Palmer, Matthew E. Hesbach, Thomas D., Jr. Mistr, E. Kirk |
author_facet |
Lynn, Sean R. Howerton, Everett B. Hreinsson, G. Tischler, Dayna S. Rogers, Claiborne Bunker, Deborah Wrona, Daniel J. Palmer, Matthew E. Hesbach, Thomas D., Jr. Mistr, E. Kirk |
author_sort |
Lynn, Sean R. |
title |
Design of a vehicle based system to prevent ozone loss |
title_short |
Design of a vehicle based system to prevent ozone loss |
title_full |
Design of a vehicle based system to prevent ozone loss |
title_fullStr |
Design of a vehicle based system to prevent ozone loss |
title_full_unstemmed |
Design of a vehicle based system to prevent ozone loss |
title_sort |
design of a vehicle based system to prevent ozone loss |
publishDate |
1993 |
url |
http://hdl.handle.net/2060/19940020006 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(166.533,166.533,-70.883,-70.883) |
geographic |
Antarctic Elliot The Antarctic |
geographic_facet |
Antarctic Elliot The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
CASI |
op_relation |
Document ID: 19940020006 Accession ID: 94N24479 http://hdl.handle.net/2060/19940020006 |
op_rights |
No Copyright |
_version_ |
1766275857566924800 |