Velocity diagrams symmetrical diagram

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. 

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... 

Figure 13. Cartesian [center-of-mass (CM)] contour diagrams for NH+ produced from reaction of N+ with H2. Numbers indicate relative product intensity corresponding to each contour. Direction of N+ reactant beam is 0° in center-of-mass system. For clarity, beam profiles have been displaced from their true positions (located by dots and 0°). Tip of velocity vector of center of mass with respect to laboratory system is located at origin of coordinate system (+). Scale for production velocities in center-of-mass system is shown at bottom left of each diagram (a) reactant N+ ions formed by impact of 160-eV electrons on N2 two components can be discerned, one approximately symmetric about the center of mass and the other ascribed to N+(IZ3), forward scattered with its maximum intensity near spectator stripping velocity (b) ground-state N+(3/>) reactant ions formed in a microwave discharge in N2. Only one feature is apparent—contours are nearly symmetric about center-of-mass velocity.12 ...

Figure 5. (A) Newton diagram of the reaction, which was studied in a crossed-beam experiment. The other three panels are 3D plots showing the velocity and angular distribution of the product BaO in reaction (8). Panel D is the full signal, which is resolved into two components, a forward-backward symmetric component shown in panel B + a forward component shown in panel C. Adapted from Ref. [102],...

FIGURE 9.3 Schematic diagram showing the spatial distribution of the Sherwood number around a symmetric stenosis. The flow converges upstream of the stenosis where the Sherwood number is elevated (radial velocity toward the wall). The flow separates (S) from the wall just downstream of the throat, if the Reynolds number is high enough, and reattaches (R) downstream. The Sherwood number is reduced near the separation point (radial velocity away from the wall) and elevated near the reattachment point (radial velocity toward the wall). 

Figure 13J A schematic diagram ofa neutron spin-echo spectrometer. The difTerence in velocities of the polarised neutron brfore and afta the scattering process can be observed by measuring the precession in the regions of uniform magnetic Md H. The difference in the precession is easily determined from the polarisation of the beam readiing the detector D if the fields before and after the sample S are symmetrical and the polarization is inverted with the flipper coil marked as n/2. The coils marked n/4 are used to provide magnetic fields that define the initial and final states of polarisation...

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