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Dołączył: 29 Paź 2010
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Wysłany: Sob 3:52, 06 Lis 2010 Temat postu: uggs ireland Vertical type gating system computer |
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Vertical type gating system computer simulation ()
Energy loss can be expressed as: H: A V2 (j a 1 ~ M) (4) where, H j of fluid oxygen from the previous section node to node about the energy loss (including loss and partial loss along the way) (cm), gross block for the corresponding node l j coefficient. For example: For Figure I. H cups of fluid from the gate to the node I of the energy loss, e. Node 1 corresponds to the resistance coefficient; H said fluid from node 1 to node 3, the energy loss, such as the node that corresponds to the drag coefficient of 3. Thus, if each node j corresponds to the drag coefficient is known, then the sections from the pouring cup to the location of the fluid F J energy loss can be obtained the following methods: L 【J = IfKe {1,2,[link widoczny dla zalogowanych], ..., N}) IHJ = ΣHnzj / (J-I ~ M (5) where, HJ said cup liquid from the gate to the node J of the fluid energy loss, Lju, Lti matrix elements for the flow path, K is the f1,[link widoczny dla zalogowanych], 2, ..., research A number of the collection,[link widoczny dla zalogowanych], its meaning is in the condition J = I H = ΣH calculated using the energy loss of each node .1 Similarly, liquid from the pouring cup to the inside runner with the energy loss is calculated under the :. 2Σf'LV (i1, 2, ..., N) (6) where, H-quilt cover from the pouring cup to the i number of the fluid energy loss within the runner,[link widoczny dla zalogowanych], the runner for the No. i the resistance of the corresponding coefficient. gating system drag coefficient corresponding to each node f., can check the drag coefficient table, simulation can also be measured by the water.: drag coefficient used in this study the data measured by the hydraulic model. (4) position correction amount of pressure head from (2) shows that, due to start when calculating the flow rate within the runner, the runner of the corresponding flow coefficient is an estimate (in this study take = 0-4), it is not filled all the time in the real flow runner coefficient (equation (2). you can speed up the iterative process of convergence speed). Thus, from (2) Find the velocity of the runner is not necessarily exactly equal to the actual flow within the runner. It} sheep 'Cast liquid with the cup at the outlet of the runner Bo. Bernoulli equation, namely: PV Xi \, P is the density of the fluid medium, g is acceleration due to gravity. This set: PVDH-a z ') () called for the position of DH Park is the amount of pressure head (cm). If the full ten ? arbitrarily small positive number, if lDH .1 0: cP: cPL + Q a At / f ~ cPi),[link widoczny dla zalogowanych], l (1I) slightly = K.ecp ~ + a ~-CHj) ・ P ・ gJ where, t is pouring time (s), △ t is the time step, K. No. for the i permeability coefficient of the cavity, the cavity depends on the conditions and the complexity of the exhaust. In addition, the type (I1), when cPt-CH <0 check Pm = 0, then the cavity is lower than the runner crossing the plane. (6) The flow coefficient of the flow coefficient within the runner. by the following equation: = V / √ 2gZ. (i = I ~ N) (I2) (7】 Reynolds number Rc gating system the location of each node Renault towel calculated as the number of Rci: Rei = 4 ・ Ri ・ Vi / 7. (I,)-type towel, Ri is a node position of the hydraulic radius Icm), is the kinematic viscosity of the fluid (cm / s). in accordance with the above , using BASIC language type casting vertical numerical simulation of common procedures. microcomputer program to run on APPLE a Ⅱ. In addition, the drag coefficient is the numerical simulation an important input parameters, this study used the same model for simulation of hydraulic resistance coefficient measured feast shown in Table 3. (Continued) \ More articles related to topics:
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