11/26/01 NIO Workshop on Wind Modeling LMS
NIO Workshop on Wind Modeling
Welcome and Introduction
Larry Stepp
11/26/01 NIO Workshop on Wind Modeling LMS
Agenda
November 26 - morning9:00 Welcome and introduction Larry Stepp
9:20 Gemini water tunnel testing Paul Gillett
9:40 The Gemini South wind loading study Myung Cho
10:10 Analysis of the Gemini data Oleg Likhatchev
10:50 Break
11:00 Previous CFD modeling of Gemini telescope and enclosure Dave DeYoung
11:30 Enclosures for Extremely Large Telescopes David Halliday
12:00 Lunch
11/26/01 NIO Workshop on Wind Modeling LMS
Agenda
November 26 - afternoon
1:00 Wind modeling studies at TSU Dr. Xu and/or Mark Whorton
1:30 What do we need to know for GSMT? George Angeli
2:00 Discussion of what we have learned so far about telescope wind loading
3:00 Break
3:20 Discussion of next efforts
5:00 Adjourn
6:30 Dinner
11/26/01 NIO Workshop on Wind Modeling LMS
Agenda
November 27 - morning9:00 Planning session for additional studies
11:00 Establish action items
12:00 Adjourn Workshop
Lunch
11/26/01 NIO Workshop on Wind Modeling LMS
Who we are
Space Telescope Science Institute
National Optical Astronomy Observatory
Gemini Observatory
National Solar Observatory
AURA New Initiatives Office
Association of Universities for Research in Astronomy
11/26/01 NIO Workshop on Wind Modeling LMS
NOAO
• Operates telescopes on Kitt Peak, Arizona and Cerro Tololo and Cerro Pachon, Chile
• Runs Time Allocation Committees that assign observing time to US Astronomers
• Develops new facilities for ground-based astronomy
11/26/01 NIO Workshop on Wind Modeling LMS
Gemini
• Gemini Observatory is an international partnership of 7 countries• United States• United Kingdom• Canada• Chile• Argentina• Brazil• Australia
11/26/01 NIO Workshop on Wind Modeling LMS
Gemini
• There are two Gemini telescopes, each 8 meters in diameter• Mauna Kea, Hawai’i• Cerro Pachon, Chile
11/26/01 NIO Workshop on Wind Modeling LMS
Background
• In the past, observatory domes were designed to shield the telescope from the wind as much as possible
• However, massive domes with minimal ventilation trapped heat• Degraded seeing
• Many telescopes of the current generation have vents to provide natural ventilation• Improved seeing• More concern about wind buffeting
11/26/01 NIO Workshop on Wind Modeling LMS
Background
• Observatories are interested in wind modeling for two reasons:• Understand seeing effects• Understand wind buffeting
• Many previous wind studies for existing telescopes were more concerned with seeing
• Plans for future extremely large telescopes depend on understanding wind buffeting
11/26/01 NIO Workshop on Wind Modeling LMS
GSMT
• NIO is developing design concepts for a 30-meter Giant Segmented Mirror Telescope
• Wind buffeting will be a key issue
11/26/01 NIO Workshop on Wind Modeling LMS
Goals for the Workshop
• Review previous wind flow studies of Gemini Telescopes
• Evaluate what has already been learned
• Identify key parameters involved in wind loading of telescopes
• Identify further studies on Gemini Telescopes to increase our understanding of wind loading on larger telescopes
• Set priorities for upcoming studies
• Reach agreement on division of labor for studies
11/26/01 NIO Workshop on Wind Modeling LMS
Agenda
November 26 - morning9:00 Welcome and introduction Larry Stepp
9:20 Gemini water tunnel testing Paul Gillett
9:40 The Gemini South wind loading study Myung Cho
10:10 Analysis of the Gemini data Oleg Likhatchev
10:50 Break
11:00 Previous CFD modeling of Gemini telescope and enclosure Dave DeYoung
11:30 Enclosures for Extremely Large Telescopes David Halliday
12:00 Lunch