文档介绍：CRYOGENIC WIND-TUNNEL MODEL TECHNOLOGY DEVELOPMENT ACTIVITIES
ACTIVITIES AT THE NASA LANGLEY RESEARCH CENTER
Clarence P. Young, Jr.*, James F. Bradshaw**,
Homer F. Rush, ~r.+,John W. Wallace**,
and Vernon E. Watkins, ~r.+
NASA Langley Research Center
Hampton, Virginia
Abstract those associated with the severe thermal environ-
ment, potential for brittle fracture, high dynamic
pressure loads, and stringent fabrication toleran-
This paper summari zes the current cryogenic ces.
wind-tunnel model technology development
activities at the NASA Langley Research Center. Although various aspects of these acti i ies
These research and development activities are have been reported in previous conferences, IsJ up
being conducted in support of the design and until recently, no wind-tunnel model existed for
fabrication of models for the new National the NTF, nor had many of the research and develop-
Transonic Facility (NTF). The scope and current ment (R&D) activities progressed to the stage
status of major research and development work is where quantitative information and/or data were
described and where available, data are presented ing.
from various investigations conducted to date. In
addition, design and fabrication experience for This paper reports on the present major
existing developmental models to be tested in the technology development activities ongoing at the
NTF is discussed. Langley Research Center for Cryogenic Model
Systems. Major activities are described, and
where available, the results of various experi-
Introduction ments, test and/or experience in the various
technological areas are presented.
The advent of High Reynolds number testing in
the cryogenic National Transonic Faci 1i ty (NTF) at Major Research and Development
the Langley Research Center has given rise to Activities
unprecedented difficulties in the design and
fabrication of model systems for the new faci