Mecanica De Fluidos; Novena Edicion [Victor L. Streeter; E. Benjamin Wylie; Keith W. Bedford] on *FREE* shipping on qualifying offers. McGraw-Hill, – Mecánica de fluidos – pages Victor Lyle Streeter Snippet view – Bibliographic information. QR code for Mecánica de los fluidos. Download Citation on ResearchGate | Mecánica de fluidos / Victor L. Streeter, E. Benjamin Wylie | Traducción de: Fluid mechanics Incluye índice }.
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Surface tension causes dluidos capillary waves and droplet formation and has an effect on discharge of orifices and weirs at very small heads. Geometric similitude extends to the actual surface roughness of model and prototype.
For testing with fluids having the same kinematic viscosity in model and prototype, the product, V Dmust be the same. It may also be shown to be a measure of the ratio of streete energy of the flow to internal energy of tho fluid. It is important at gas-liquid or liquid-liquid inter- faces and strewter where these interfaces are in contact with a boundary. In terms of M, L, T, determine the dimensions of radians, angular velocity, pon.
The various corresponding pressure coefficients are the same. Thc resistance to motion of a. The remainder is stepped up to prototype size by Froude’s law, and the prototype skin friction is computed and added to yield total Eesistance due to the water.
Frequently this requires very high velocities in small models. Skin-friction studies should be based on equal Reynolds numbers in model and prototype, but wave resistance depends upon the Froude number.
The difficulty is surmounted by using a small model and measuring the total drag on it when towed. Open-channel flow at depth y is rapid when the flow velocity is greater than the speed 6 of an elementary wave in quiet liquid. The speed of sound in a liquid is written dw, if K is the bulk modulus of elasticity Secs. It is a measure streeteer the ratio of inertial forces to elastic forces.
Mecánica de los fluidos – Victor L. Streeter, E. Benjamin Wylie – Google Books
For geometrically similar machines if the mecabica diagrams of velocity entering or leaving the moving parts are similar, the units are homotogous; i. Tranquil flow occurs when the flow velocity is less than fi. If accurate quantitative data are to be obtained from a model study there must be dynamic similitude between model and prototype.
It is the most important correlating parameter when velocities are near or above local sonic velocities.
Arrange the following groups into dimensionless parameters: The particular value depends upon the situation. Part b may also be expressed as a kinematic similitude; i.
The Mach number ‘is also of importance in axial-flo w compressors and gas turbines. By inspection, arrange the following groups into dimensionless parameters: They permit visual observation of the flow and make possible the obtaining of certain numerical data, e.
The skin friction is then computed for the model and subtracted from the total drag. Due to the moving parts in a hydraulic machine, an extra parameter is required to ensure that t.
Hence, for strict dynamic similitude, the Mach, Reynolds, Froude, and Weber numbers must be the same in both model and prototype. In compressible flow, the Mach number is generally more significant than the Reynolds number.
Streeter – Fluid Mechanics, 3rd
Find the dimensions of the quantities in Prob. In steady flow in a pipe fljidos and inertial forces are the only ones of consequence; hence, when geometric similitude is observed, the same Reynolds number in model and prototype provides dynamic similitude.
This similitude requires a that there be exact geometric similitude, and b that the ratio of dynamic pressures at corresponding points be a constant. To satisfy both requirements, model and prototype have to be the same streetef. Model studies of proposed hydraulic structures and machines are frequently undertaken as an aid to the designer.
Discussion of a few cases will make this clear. This parameter must relate the throughflow discharge to the speed of moving parts.