upstream pressure 中文意思是什麼

upstream pressure 解釋
閥前壓力
  • upstream : adv. 向上游，溯流。adj. 1. 溯流而上的。2. （石油工業等）上游的，和石油的勘探、開采及輸送到起運港口有關的〈石油工業此後的提煉等過程則稱為下游（downstream）產業〉。
  • pressure : n 1 壓；按；擠；榨。2 【物理學】壓力，壓強；大氣壓力；電壓。3 精神壓力，政治[經濟、輿論等]壓力。4...
  1. A perturbation in pressure at the upstream end of the feed system could result in sizable oscillations in flow rate and chamber pressure.

    供應系統上游端的壓力擾動可導致相當的流量和室壓振蕩。
  2. The convective term is solved by ausm + ( a sequel to ausm which means " the advection upstream splitting method " ). the 7 species 8 steps model and 7 species 7 steps model of hydrogen / air is used in the hydrogen reacting flowfield, the 9 species 5 steps model of methane, the 10 species 10 steps model of ethane and the 10 species 13 steps model of kerosene are used in the hydrocarbon reacting flowfield, the results of the distributions of velocity, mach number, pressure, static temperature, total temperature, species mass fraction and the combustion efficiency are gained, and the numerical results of the pressure of hydrogen and methane are compared with those of the experiment

    計算中通量項採用ausm +通量分裂格式，氫反應流場採用氫/空氣的七組元八方程模型和七組元七方程模型，碳氫反應流場採用甲烷的九組元五方程模型、乙烯的十組元十方程模型和煤油的十組元十三方程模型，得出了超燃發動機燃燒室流場的速度、馬赫數、壓力、靜溫、總溫和組元質量分數分佈及燃燒效率等性能參數，其中氫和甲烷的計算壓力分佈與實驗結果進行了比較。
  3. The measurements of discharge coefficients and pressure coefficients along the models with aspect ratios of 0. 5, 1. 0 and 2. 0 were carried out under various aerodynamic and geometric parameters ( reynolds numbers : 20000, 40000, 60000, 80000 ; suction rates : 0. 3, 0. 45 and 0. 6 ; rib angles : 45, 60, 90, 120 ; rib height - to - width ratio h / e : 1. 0 and 2. 0 ; film hole location : middle of ribs. upstream of ribs and downstream of ribs ). based on the abundant experimental data and figures, rules of discharge coefficients and pressure coefficients in dependence of geometric and aerodynamic parameters were given out

    根據實驗課題的要求，在寬高比分別為1 . 0 、 2 . 0和0 . 5的內流冷卻通道里，在不同的氣動和幾何參數（雷諾數re分別為20000 、 40000 、 60000 、 80000 ，出流比sr為0 . 3 、 0 . 45和0 . 6 ，肋角分別為45 、 60 、 90 、 120 ，肋高h e分別為1 . 0和2 . 0 ，孔位分別為肋中間、肋下游和肋上游）的情況下，對流量系數和壓力系數以及流場進行了實驗研究，獲得了大量的實驗數據和圖形，較為詳細地給出了流量系數和壓力系數隨不同氣動參數和幾何參數而變化的規律。
  4. The shearing layer is carried by the jet and the eddy is formed because of the instability and selective amplification of shearing layer which will propagate to the downstream. as the eddy impacts the impinging wall, a wave of pressure disturbance with certain frequency is induced. this wave then propagates to the upstream with high speed, and results in the overlap and amplification of the waves when the frequencies of them are close with each other

    當前噴嘴流束中的不穩定擾動波在穿過腔內的剪切層時，剪切層對其有選擇放大作用，形成渦環結構，剪切流動中渦環與碰撞壁撞擊，在碰撞區域產生壓力擾動波並向上游反射，在上游剪切層分離處誘發新的擾動的產生，當新擾動與原擾動匹配時，射流上游就被不斷地受到周期性激勵，腔內就產生流體自激振蕩並在後噴嘴出口形成脈沖射流。
  5. Relief vent will discharge water when, during no - flow periods, ( 1 ) the first check valve is fouled or ( 2 ) the inlet pressure to the device drops sufficiently due to upstream pressure fluctuations

    如果在無流動期間，安全閥排氣口有水排出，則原因可能是， （ 1 ）第一止回閥受到污染，或（ 2 ）由於上游壓力波動造成裝置的進口壓力下降太大。
  6. In balancing valve upstream and downstream ends of the tube with a hole, used to measure the fluid through valves pressure reduction

    在平衡閥的上游、下游端各裝一個測壓孔，用來測量流體通過閥門的壓降。
  7. Intercept the fluid medium upstream of the valve to be inspected with a shut - off valve and ensure that the subject valve is not under pressure ( vent downstream, if necessary )

    截取閥門上游的流體介質，用一個關閉閥門來進行檢測，確保相關的閥門不處在壓力下（如果必要的話，排除下游的流體介質） 。
  8. The most common method of determining maximum differential pressure across the valve seats is to assign the maximum design or operating pressure the upstream value p1 and assume a downstream pressure p2 of 0 psig

    測定閥門閥座的最大壓差的最常用方法是將最大設計或工作壓力作為上游的壓力值p1 ，然後假定下游壓力值p2為0psig
  9. Halliburton offers a broad array of products and services to upstream oil and gas customers worldwide, ranging from integrated software and services to drilling tools, logging, and perforating technology, from manufacturing of drill bits and other downhole and completion tools to pressure pumping services

    哈里伯頓公司自二十世紀七十年代末即開始同中國石油工業的合作，與中石油、中石化、中海油等公司有十分密切的業務關系，目前是中國石油勘探和開發領域最大的設備和服務提供商之一。
  10. There is a pressure probe at a measurement location a distance l upstream of the blade row

    距葉柵上游長度為l處有一個壓力探測器。
  11. Each valve is fitted with 2 pressure test points, red strap indicating upstream ( high pressure ) and blue strap indicating downstream ( low pressure ) for differential pressure measurement

    每個閥門配置2個壓力測試點，紅帶表示上游（高壓） ，藍帶表示下游（低壓） ，用於壓差測量。
  12. In this case, when one of the machines be placed into the transition process of the vident fluctuating pressure for some kind of reason, the other machines would be affected become of the fluctuating pressure in the diversion system and drainage system of water in upstream and downstream which use the same one surge tank and the same one penstock with the machine, so the other machines would be put into transition process of fluctuating pressure, and become a kind of hydroelectric interfere

    在高水頭引水式水電站中，通常幾臺機組共用同一調壓井，且共用壓力主管。在這種情況下，當其中一臺機組由於某種原因處于大波動過渡過程，則其在電站上下游引、尾水系統中引起的壓力變化必然會影響與其共用調壓井和壓力主管的其它機組，使其它機組也處于過渡過程，形成一種水力干擾。
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