タイトル（掲載誌）航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-662
一般注記The performance of a thrust chamber with a nozzle whose nominal expansion area ratio was 140:1 was evaluated under environmental pressure of 8 to 13 torr. The nominal vacuum thrust of the chamber was 400kgf at a chamber pressure of 35.5kg/cm2, abs. Measurements were also made of the wall static pressure distribution, wall heat flux distribution over the heat sink nozzle extention, and of the Pitot pressure distribution at the nozzle exit plane. The effects of hydrogen inlet temperature and chamber pressure on the thrust chamber performance was not significant over a temperature range of 120 to 140 K and a chamber pressure range of 30 to 39kg/cm2, abs. In the mixture ratio range of 4.5 to 6.5, characteristic velocity and vacuum specific impulse Ispv decreased with mixture ratio, while thrust coefficient increased slowly with mixture ratio in the range of 4.5 to 6.0. The measured Ispv at the mixture ratio of 5.5 was about 450kgf・s/kg. Measured performance values were compared with analytical prediction. The predicted vlue was too low apparently because of large calculated boundary layer loss. It was also shown that the stronger dependence of Ispv on the mixture ratio compared with the one-dimensional equilibrium value was partly attributable to chemical kinetic loss. The measured nozzle wall pressure and the nozzle exit Mach number distribution were in reasonable agreement with predicted values calculated by the two-dimensional nozzle analysis computer program developed by the authors. The measured nozzle wall heat flux in the nozzle area ratio 75 to 140 was 11 to 6 cal/(cm2・s) decreasing with area ratio in approximate tendencial agreement with either turbulent boundary layer calculation or simplified Bartz equation.
資料番号: NALTR0662000
レポート番号: NAL TR-662
一次資料へのリンクURLhttps://jaxa.repo.nii.ac.jp/?action=repository_action_common_download&item_id=44919&item_no=1&attribute_id=31&file_no=1
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
提供元機関・データベース宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ