An Electronic Nose is being developed at JPL and Caltech for use in environmental monitoring in the International Space Station. The Electronic Nose (ENose) is an array of 32 polymer film cmnductometric sensors; the pattern of response may be deconvoluted to identify contaminants in the environment. An engineering test model of the ENose was used to monitor the air of the Early Human Test experiment at Johnson Space Center for 49 days. Examination of the data recorded by the ENose shows that major excursions in the resistance recorded in the sensor array may be correlated with events recorded in the Test Logs of the Test Chamber.
P r i m Maurits Laboratory TNO P.0.Box 45, 7780 A A R i j s w i j k , The Netherlands ABSTRACT P r e s e n t l y , t h e r e is a n i n c r e a s e d i n t e r e s t i n composite p r o p e l l a n t s t h a t burn w i t h low flame t e m p e r a t u r e s and do n o t c o n t a i n c h l o r i n e or chlor i n e compounds. A p p l i c a t i o n s f o r such p r o p e l l a n t s may be found i n t u r b i n e s t a r t e r s and i n no or low smoke r o c k e t e n g i n e s . P h a s e -s t a b i l i z e d ammonium n i t r a t e (ANSI-based p r o p e l l a n t s meet t h e s e r e q u i r e m e n t s , b u t a l s o o t h e r composite p r o p e l l a n t f o r m u l a t i o n s a r e f e a s i b l e such as p r o p e l l a n t s based on a r u b b e r b i n d e r and n i t r o g l y c e r i n ( N G I o r t r i m e t h y l o le t h a n e -t r i n i t r a t e (TMETN). I n o r d e r t o compare t h e performance o f t h e s e p r o p e l l a n t s , t h r e e d i f f e r e n t f a m i l i e s have been developed and t e s t e d : 1 ) HTPB b i n d e r w i t h ANS and v a r i o u s c a t a l y s t s , 7 ) PU b i n d e r w i t h NG and n i t r o g u a n i d i n e ( N Q ) o r 3) PU b i n d e r w i t h TMETN and NQ o r GuNi. With some e x c e p t i o n s a11 p r o p e l l a n t f o r m u l a t i o n s have c a l c u l a t e d flame t e m p e r a t u r e s between 1200 K and 1400 K. I n s p e c i a l b u r n e r s t h e combustion c h a r a c t e r i s t i c s of t h e s e P r o p e l l a n t s have been i n v e s t i g a t e d in t h e p r e s s u r e r e g i o n between 1 and 10 MPa. The r e s u l t s of t h i s s t u d y show t h a t b u r n i n g r a t e s up t o 7 mmls at 10 MPa may be o b t a i n e d , w h i l e t h e burning rate exponent may v a r y between 0,3 and 0.7. I n a d d i t i o n , t h e importance o f c a t a l y s t s t o improve t h e i g n i t a b i l i t y o f (ANSI-BASED propel-l a n t s is confirmed.g u a n i d i n e n i t r a t e (GuNi), v
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.