국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Application of C/C composites for RCS engines. (Evaluation test of SiC/C-FGM coatings chambers)
저자	Masahiro, SATO, Makoto, Tadano, Kazuo, Kusaka, Masayuki, Niino, Akio, Moro
Keyword
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001427.pdf?id=NALTR0001427
보고서번호	NAL-TR-1427
발행년도	2001. 7
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	Three kinds of carbon fibers-reinforced carbon matrix (SiC/C)-functionally graded materials (FGMs) chambers were cyclically tested using the bipropellant of nitrogen tetroxide (NTO) /monomethyl hydrazine (MMH) to evaluate their durability, aiming for use in future reusable reaction control system (RCS) engines. Firing test were performed, at Pc=0.9MPa, MR=1.65, to evaluate the durability and performance using the three kinds chambers, i. e., the nozzle expansion ratio e of the first made chamber is 1.75, that of the third made chamber is 7, and that of the second chamber is 30. The items evaluated in the test series were durability under repeated combustion test and engine performance in terms of vacuum specific impulse (Ispv). After the cycle tests, these chambers were inspected to evaluate the damage mode using the non-destructive method. In the third made chamber, to which was applied both the 8-harness satin fabrics arrangement of the fibers and 40mm FGM layer/C-SiC matrix, the damage seemed to be less than that to the first and second chambers. The final goal of the durability for this third made chamber is 7465 times for the cycle test.