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Accelerating tube length

Fig. 4. Schematic diagram of a TOF spectrometer where is the extraction field, E the acceleration field, and E tube length (1). Fig. 4. Schematic diagram of a TOF spectrometer where is the extraction field, E the acceleration field, and E tube length (1).
The ensuing flame propagation, being unstable, continually accelerates along the tube, and with sufficient tube length, produces a detonation. Such an exptl procedure affords few controls, and the flexibility of such a system is quite limited. However the so-called "shock tube possesses all the desirable qualities that are needed for a detailed study of detonative processes (Ref 8, pp 1 2)... [Pg.731]

Separating variables and integrating them in the integral of [0, np0], the distance that the particle has to travel in the accelerating tube, or, in other words, the effective length of the accelerating tube needed, L.K, can be obtained as... [Pg.47]

Figure 2.6 shows the relationship between the residence time of a single particle in the impingement zone, tf, and the length of the accelerating tube, /ac. As can be seen, in the range of /ac smaller than 1.0, t increases quickly as /ac increases while after /ac = 1.0, the increase in /, with /ac is smoothed. [Pg.54]

It is clear from Fig. 4.5 that the data for ,c>p are considerably concentrated over 85% of the values are in the range 4.3 to 6.2, and the average value is 5.34. This fact indicates that ,c>p can be considered to remain essentially constant and that, consequentially, Eq. (4.11) describes well the pressure drop behavior due to the acceleration and collisions of the particles. Therefore the combined consideration of the two kinds of collisions, i.e., the collisions of particles on the wall and between particles, is reasonable and feasible. It should be noted that, as described by Eqs. (4.5) and (4.6), for a given impinging velocity u0, the velocity of particles at the outlet of the accelerating tube depends on the length of the tube Lac, the particles to gas mass flow rate ratio and the mean diameter of particles dv. Therefore Eq. (4.11) actually... [Pg.102]

Length of the accelerating tube calculated with the method described in Chapter 4, L = L2 =0.6 m ... [Pg.138]

The conventional theory states that if the average value of the Mach number (Mam, defined as the ratio between the fluid velocity and the speed of sound) along a channel is less than 0.3 the flow can be modeled locally as incompressible. In addition, when the pressure drop along the tube length is lower than 5 % of the inlet pressure, the effect of the acceleration of the gas flow in the axial direction can be neglected (in other words, the variation of the gas density along the channel can be neglected). [Pg.512]

Since the pressure drop along the tube length is much larger in microchannels than in conventional-sized tubes, the effects of the gas acceleration caimot in general be neglected, even for very low values of the Mach numbers as observed theoretically and experimentally by several authors. [Pg.512]

Particular attention must be paid to the particular case D = 21 mm. As seen in Fig. 11, for most of the tube lengths the flame speed variations follow the characteristics pertaining to the cases of 36-and 55-mm-diam tubes, namely, initial acceleration, period of slowdown, and further acceleration after 3 m of propagation. As stated previously, this means that the flow acceleration due to the area change at the chamber-to-duct transition does not result in a sufficient magnitude of flame speed to lead to a direct detonation emergence. However, as shown in Fig. 11, this interpretation is refuted for tiie particular case L= 2.5 m, since the flame... [Pg.96]


See other pages where Accelerating tube length is mentioned: [Pg.426]    [Pg.474]    [Pg.638]    [Pg.813]    [Pg.40]    [Pg.47]    [Pg.405]    [Pg.405]    [Pg.474]    [Pg.44]    [Pg.48]    [Pg.54]    [Pg.54]    [Pg.70]    [Pg.93]    [Pg.96]    [Pg.104]    [Pg.131]    [Pg.150]    [Pg.12]    [Pg.454]    [Pg.463]    [Pg.785]    [Pg.175]    [Pg.47]    [Pg.793]    [Pg.355]    [Pg.642]    [Pg.474]    [Pg.637]    [Pg.145]    [Pg.1029]    [Pg.736]    [Pg.2339]    [Pg.2345]    [Pg.624]    [Pg.39]    [Pg.40]    [Pg.55]    [Pg.58]   
See also in sourсe #XX -- [ Pg.54 , Pg.70 , Pg.93 , Pg.104 ]




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