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기술보고서

기술보고서 게시판 내용
타이틀	Computational Aerodynamic Simulations of a Spacecraft Cabin Ventilation Fan Design
저자	Tweedt, Daniel L.
Keyword	ALGORITHMS;; COMPUTATIONAL FLUID DYNAMICS;; COMPUTATIONAL GRIDS;; COSTS;; FAN BLADES;; FLOW DISTRIBUTION;; INTERNATIONAL SPACE STATION;; LONG DURATION SPACE FLIGHT;; NOISE REDUCTION;; RADIAL VELOCITY;; SIMULATION;; SPACECRAFT CABINS;; TANGENTIAL BLOWING;; VENTILATION FANS
URL	http://hdl.handle.net/2060/20110002972
보고서번호	NASA/CR-2010-216330
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Quieter working environments for astronauts are needed if future long-duration space exploration missions are to be safe and productive. Ventilation and payload cooling fans are known to be dominant sources of noise, with the International Space Station being a good case in point. To address this issue cost effectively, early attention to fan design, selection, and installation has been recommended, leading to an effort by NASA to examine the potential for small-fan noise reduction by improving fan aerodynamic design. As a preliminary part of that effort, the aerodynamics of a cabin ventilation fan designed by Hamilton Sundstrand has been simulated using computational fluid dynamics codes, and the computed solutions analyzed to quantify various aspects of the fan aerodynamics and performance. Four simulations were performed at the design rotational speed: two at the design flow rate and two at off-design flow rates. Following a brief discussion of the computational codes, various aerodynamic- and performance-related quantities derived from the computed flow fields are presented along with relevant flow field details. The results show that the computed fan performance is in generally good agreement with stated design goals.