Velocity diagrams

Second corner reflection The first corner reflection appears as usual when the transducer is coupled to the probe at a certain distance from the V-butt weld. The second corner reflection appears if the transducer is positioned well above the V-hutt weld. If the weld is made of isotropic material the wavefront will miss (pass) the notch without causing any reflection or diffraction (see Fig. 3(a)) for this particular transducer position. In the anisotropic case, the direction of the phase velocity vector will differ from the 45° direction in the isotropic case. Moreover, the direction of the group velocity vector will no longer be the same as the direction of the phase velocity vector (see Fig. 3(b), 3(c)). This can be explained by comparing the corresponding slowness and group velocity diagrams. 

Figure 4 Slowness and group velocity diagrams for isotropic weld material...

Figure B2.3.16. Velocity diagram for die reaction of a photolytically generated reagent with an assumed stationary co-reagent. In this case, the relative velocity of the reagents is parallel to the velocity c of the centre of mass.

From the velocity diagram in Fig. 29-13 it is apparent that an increase in wheel peripheral velocity [L permits an increase in nozzle exit velocity C] without increasing Co- Accordingly, a high-speed tur-... 

Evaluating off-design performance is strongly recommended for the purpose of improving the operating reliability of both power recovery sets and processing plants. To do this evaluation, a simulation analysis should be based on velocity diagrams, the law of similarity, and expander performance maps. 

Fig ure 8-11. When the absolute speed is reduced, the velocity diagram changes. 

Type of Velocity Diagram Hub-tip Radius Ratio Number Of Stall Zones Rate, Stall Speed, abs/ Rotor Speed Fluctuation during stall, i pVIpV Radial Extent of Stall Zone Type of Stall ... 

The 50% reaction turbine has been used widely and has special significance. The velocity diagram for a 50% reaction is symmetrical and, for the maximum utilization factor, the exit velocity (V4) must be axial. Figure 9-11 shows a velocity diagram of a 50% reaction turbine and the effect on the utilization factor. From the diagram IV = V4, the angles of both the stationary and rotating blades are identical. Therefore, for maximum utilization. 

Figure 6-3. Velocity diagrams for an axial-flow compressor stage.

Another important factor in design is the steepness of the characteristic curve, that is, the variation of pressure ratio with mass flow (see Figure 1-3 ), From consideration of the velocity diagram for 50% reaction, such as (d) of Figure 6-5, it can be shown that the symmetrical arrangement cives... 

Velocity diagram, axial, 228 Velocity head, 36, 38 Velocity sensors, 352 Velocity transducers, 349 Velocity variation through an axial, 229... 

The flow velocity diagrams on both sides of the impeller are shown in Fig. 9.44. The axial direction is the datum for all angles. 

Figure 32.16 Flow path shapes, velocity diagrams and characteristics...

Fig. 10.—Centrifugal-pump velocity diagram with actual entrance diagram ...

Figure 1 Interfacial stability for freezing of typical natural lake water a) Wavelength-velocity diagram for two liquid temperature gradients Gi, and b) Stability function Sr from Sekerka for dilute NaCl solutions for a range of plausible values of k.

Therefore, for conditions of similarity of flow rt, K2, and Ttj are constant. Stepanoff [12] has shown that the velocity diagrams at the impeller are geometrically similar when the pumps are operating at the same efficiency for similar pumps or for the same pump at different speeds. 

To evaluate the term ACh., we need to examine the velocity diagram for the blade, as shown in Figure 15.2. 

But the power abstracted is also given from the velocity diagram as equation (15.29), repeated below ... 

From the symmetry of the velocity diagram, demonstrated in Section 15.10,... 

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