Jet number

Based on their experiments, Tanasawa and Toyoda1411 proposed a new dimensionless number for the classification of jet breakup regimes. This number, called Jet number, is defined as ... 

Although the Jet number is used for the classification, it should be noted that the intrinsic characters of a liquid flow depend on the Reynolds number. By combining the Jet number with the Reynolds number and introducing a correction factor for viscosity, the modes and configurations of liquid jet breakup can be clearly defined and described.[41]... 

No. Target materials Target thickness (mm) Jet numbers Unit charge weight Puncture depth (mm)... 

It might be thought that the small number of molecules in a typical supersonic jet or beam would seriously limit the sensitivity of observation of the spectra. Flowever, the severe rotational cooling which may be produced results in a collapsing of the overall intensity of a band into many fewer rotational transitions. Vibrational cooling, which greatly increases the population of the zero-point level, concentrates the intensity in few vibrational transitions, and these two effects tend to compensate for the small number of molecules. 

Arc furnaces Archery bows Archimedes number Architectural fabrics Architectural lamnates Arc-jet thrusters... 

A number of laboratory tests are used to predict chemical stabihty. The amount of existent gum in a gasoline is determined by ASTM D381. This method involves evaporating a sample by a jet of heated air. The residue is weighed, solubles are extracted with / -heptane, and the sample is reweighed. 

The pumping number is a function of impeller type, the impeller/tank diameter ratio (D/T), and mixing Reynolds number Re = pND /p.. Figure 3 shows the relationship (2) for a 45° pitched blade turbine (PBT). The total flow in a mixing tank is the sum of the impeller flow and flow entrained by the hquid jet. The entrainment depends on the mixer geometry and impeller diameter. For large-size impellers, enhancement of total flow by entrainment is lower (Fig. 4) compared with small impellers. 

Naphthenic acids occur ia a wide boiling range of cmde oil fractions, with acid content increa sing with boiling point to a maximum ia the gas oil fraction (ca 325°C). Jet fuel, kerosene, and diesel fractions are the source of most commercial naphthenic acid. The acid number of the naphthenic acids decreases as heavier petroleum fractions are isolated, ranging from 255 mg KOH/g for acids recovered from kerosene and 170 from diesel, to 108 from heavy fuel oil (19). The amount of unsaturation as indicated by iodine number also increases in the high molecular weight acids recovered from heavier distillation cuts. 

Consider the case of the simple Bunsen burner. As the tube diameter decreases, at a critical flow velocity and at a Reynolds number of about 2000, flame height no longer depends on the jet diameter and the relationship between flame height and volumetric flow ceases to exist (2). Some of the characteristics of diffusion flames are illustrated in Eigure 5. 

Overflow machines (Fig. 12) may be thought of as hybrids of jets and winches. They usually feature a winch reel which, unlike the cloth-guiding roUer in a jet, is normally driven and provides motive power to the fabric. There is also some driving force on the cloth from the circulation of the Hquor through the overflow tube down which they both pass. Both pressurized and nonpressurized versions exist and are available from a large number of different makers. 

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