@techreport{oai:jaxa.repo.nii.ac.jp:00044215, author = {高森, 晋 and 坂口, 一 and TAKAMORI, Susumu and SAKAGUCHI, Hajime}, month = {Feb}, note = {二次元減速翼列実験では,翼列設定部における気流の剥離を防ぐ目的で抽気を行う必要がある。超音速翼列風洞の抽気用低圧源としての使用を目的として,全長が2.5m,直管型混合管内直径が155.5mmのCenter-jet Typeの空気エゼクターを製作し,一次ノズル・スロート対混合管の断面積比,混合管長,ディフューザー長,ノズル・マッハ数などの,エゼクターの構成要素が,一次側(駆動流)全圧と二次(吸込み)側圧力との関係,流量比対二次側圧力との関係,などのエゼクター性能に及ぼす影響について系統的に調べた。本報告では零二次流における,エゼクターの真空特性と,上に述べた,エゼクターの構成要素との関係について示し,最適作動点について考察する。, The air ejector has almost limitless application possibilities in engineering practice due that is to its simplicity. To determine the feasibility of using an ejector as a suction pump for boundary-layer air removal in the Two-Dimensional Supersonic Cascade Tunnel, especially when a portion of the tunnel′s air supply is used for its primary flow, both subsonic and supersonic air ejector tests were conducted. The tested eje relationship between secondary pressre (secondary vacuum chamber pressure) and primary stagnation pressure (primary pressure characteristics) during a zero-secondary-flow condition. (2) The effect of throat area ratio of primary nozzle to mixing tube on primary pressure characteristics. (3) The relationship between the minimum secondary pressure and throat area ratio. (4) The optimal operating conditions for a zero-secondary-flow subsonic ejector. (5) The effect of primary Mach numbers on a zero-secondary-flow supersonic ejector performance., 資料番号: NALTM0632000, レポート番号: NAL TM-632}, title = {超音速二次元翼列風洞用空気エゼクターの実験(第一報・二次流量が零の場合の性能)}, year = {1991} }