旋渦隧道溢洪道及液壓操作條件外文翻譯-液壓系統(tǒng)-文庫吧資料
2025-05-22 00:59本頁面
【正文】 ng 13 m in diameter and 148 m in height, a tangential vortex generating device, and a tailrace tunnel. The studies that were performed showed that in the shaft which delivers water to the flow rotation node, an intermediate water level is maintained when the flow rate is less than the design rate. This bench mark depends on the magnitude of the escapage discharge and the resistance of the spillway segment situated at a lower level . In the constructions that have been considered here, maximum (design) flow rates through the shaft are achieved when the shaft is flooded and there is no access to the air. In the model nearly 5 plete entrapment of air from the water surface occurred with intermediate water levels in the shaft。mamskii hydraulic works, Are q = 。 inparticular, techniques are now available for calculating the hydraulic resistance of individual legs of a route and the flow rates and pressures in vortextype flow. However, for each actual hydraulic project a designed structure must also be evaluated by means of model investigations, since it is still not possible to evaluate all the elements of the operation of a spillway by means of , let us turn our attention to a number of theoretically important problems. A familiarity with these topics will be of assistance in the design and investigation of vortex spillways. Evaluation of the Design and Geometric Dimensions of the Elements of a Spillway. The selection of a particular type of spillway depends on a number of factors, such as the effective head, the magnitude of the escapage discharge, theconfiguration of the hydraulic project (for example, the use of a river diversion tunnel during the operational period or of the water conduits of hydroelectric power plants in the construction period), conditions in the discharge of the flow into the tailrace channel, topographic and geological features (in particular, the possible length of the tailrace leg), and the technical and economic (entry segment in the form of surface or subsurface offtake). The inlet is designed on the basis of standard techniques to maintain its conveyance capacity when functioning in the freefall regime. Shafts (vertical or inclined). The diameter of the shaft is made nearly equal to the diameter of the tailrace leg: It should be noted that the eddy node is designed so that A = Areq, where Are q is the value of the geometric parameter of the vortex generator needed to maintain the required 3 prerotation of the flow. For example, for the conditions of the Tupolangskii vortextype spillway, Are q = 。mamskii, and Tupolangskii hydraulic works based on different operating principles have now been pleted. These constructions may be divided into the following basic groups: vortextype (or socalled singlevortex type) spillways with smooth dissipation of the flow energy throughout the length of the tunnel when L r (60 80)hT or (60 80)dT (where dT and hT are the diameter and height of the tunnel), while the crosssection of the tunnel is either circular or nearcircular throughout its length. vortextype spillways with increasingly greater dissipation of the energy of the vortextype flow over a shorter length 2 Lr (60 80)hT of a noncircular section river diversion tunnel (horseshoeshaped, square, triangular) which is connected to the eddy chamber either by means of an energydissipation (expansion) or by means of a smooth transition leg。 1 VORTEXTUNNEL SPILLWAYS AND HYDRAULIC OPERATING CONDITIONS M. A. Galant, B. A. Zhivotovskii,V. B. Rodionov,and N. N. Rozanova Executive Summary Spillway tunnel is widely used in highpressure hydraulic engineering. Therefore, this type of spillway this study is an important and urgent task to help in the use of these types of hydraulic construction of spillway can help develop the best and reliable spillway structure. This is confirmed by vortex spillway tunnel in the design of a pressure fluctuation and intensity of turbulent energy dissipation process Keywords: vortex spillway energy di
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