螺旋管壓力計 的英文怎麼說
中文拼音 [luóxuánguǎnyālìjì]
螺旋管壓力計
英文
spiral pressure ga(u)ge- 螺 : 1. [動物學] (軟體動物) spiral shell; snail; conch 2. (螺旋形的指紋) whorl (in fingerprint)
- 旋 : 旋Ⅰ動詞1 (旋轉) whirl 2 (用車床切削或用刀子轉著圈地削) turn sth on a lathe; lathe; pare Ⅱ名詞...
- 管 : Ⅰ名詞1 (管子) pipe; tube 2 (吹奏的樂器) wind musical instrument 3 (形狀似管的電器件) valve;...
- 壓 : 壓構詞成分。
- 力 : Ⅰ名1 (力量; 能力) power; strength; ability; capacity 2 [物理學] (改變物體運動狀態的作用) forc...
- 計 : Ⅰ動詞1 (計算) count; compute; calculate; number 2 (設想; 打算) plan; plot Ⅱ名詞1 (測量或計算...
- 螺旋 : 1 (具有螺紋的圓柱體 屬于斜面類的簡單機械) corkscrewspin; screw; spiral; helix 2 (螺旋現象;尾旋...
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In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft, the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s. ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well. ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively
本文通過試驗研究與理論分析對旋流式豎井泄洪洞應用於高水頭、大泄流量情況時存在的一些水力學問題進行了研究和探討,取得以下主要成果:一、結合小灣工程導流洞改建,對高水頭( 252m ) 、大泄流量( 1400m ~ 3 s )條件下旋流式豎井中的水流運動特徵進行了比較全面的測量,包括空腔形態、徑向流速分佈及井壁壓強等;二、提出了豎井空腔段螺旋水流水力計算方法,其計算結果與實測值吻合良好;三、利用試驗與計算結果,對旋流式豎井的消能機理進行了探討,對豎井各部分的消能能力有了總體認識;四、對豎井下部消力井的合理井深進行了優化試驗研究,發現消力井合理深度為0 . 9d左右;五、通過試驗研究,歸納出豎井水流總摻氣量估算方法,為導流洞排氣方案的設計提供了參考依據;六、在高水頭、大流量條件下,豎井空腔段下部流速很高,盡管水流螺旋運動引起的離心力可以確保井壁壓強保持正壓,但空化數依然較低,因此豎井的空化空蝕始終是工程界關注的重大問題。The results show that while the mass flow of refrigerant is 1. 85g / s, the inlet temperature of refrigerant is 18. 9, the evaporating pressure is 0. 62mpa, the mass flow of water is 31. 1g / s, and the inlet temperature of water is 36. 9, the refrigerant of miniature evaporator wholly vaporizes in the tube, and the heat transfer rate is 342w. it achieved the demand of design
經過實驗測試,當製冷劑質量流量為1 . 85g / s ,製冷劑入口溫度為18 . 9 ,蒸發壓力為0 . 62mpa ,水的質量流量為31 . 1g / s ,水的入口溫度為36 . 9 ,此時,螺旋管蒸發器內製冷劑完全蒸發,換熱量342w ,達到了微型蒸發器的預期設計要求。By presenting the simplified flow model, the flow and velocity triangles were analyzed. in the paper, the author excavated the performance, calculated the velocity - pressure and flow loss of the worm shell, the outlet element of the pump
論文還深入研究了螺旋型離心泵的蝸型擴散管的結構和原理,計算了蝸型管的速度、壓力、流動損失,分析了擴散管的增壓原理。
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