Comparison nozzles

FIG. 26-70 Accuracy in HEM predictions for slightly to moderately siibcooled flashing flow. Comparison with data for water by Sozzi and Sutherland (1975) also ASME Symposium on Non-Equilibrium Two-Phase Flows (1975) (Nozzle type 2). 

Figure 10.26 also presents comparisons of nozzle noise potentials, two-dimensional plots of constant noise (dBA) levels in proximity to the experimental LVHV nozzles. Noise potentials for a plain circular nozzle,... 

In this method a 2-inch diameter screen is sprayed with w from a nozzle at a definite pressure for a definite time (Ref 45). A comparison of some sieve data by this method for different materials is shown in Table 4... 

Figure 20. Comparison between the experimental bubble flow and the total flow through the jet nozzle.

Comparison of the calculated and the experimentally observed tracer concentration profiles is good as shown in Figs. 38 through 42 for set points 3 employing the 0.254 m jet nozzle assembly. 

Calderbank (Cl) employed a crystal microphone located in the gas supply line near the nozzle tip, which was connected to an oscilloscope through a preamplifier. The photographic comparison of this signal with a constant-frequency (60 cps in this case) test signal, yielded the frequency of bubble formation. 

This conclusion is confirmed by the calculation of the combustion-induced pressure-area integrals for both types of nozzles (Fig. 23.9). It follows from comparison of Figs. 23.6 and 23.9 that tube-micropylons with injection at an angle of 45° relative to the main-stream air flow direction provide better performance than fin-pylons with co-flow injection. 

Figure 23.9 Comparison of normal- sprays) injected through elliptic noz-ized combustion induced pressure-area in- zles from tube-micropylons and fin-tegral for fin-pylons with elliptic ( ) and pylons. The following results were ob-round (2) nozzles tained ...

There is opportunity in the future not only to perform CCD simulations to understand and develop parametrics of components, but also to elucidate inlet, combustor, nozzle interactions, and optimization. Further a validated system code is needed from the system performance prediction, comparison, optimization, and design points of view. The study should be extended to various fuel-oxidizer combinations. 

Fig 1 Comparison of Curved Front Theory with Nozzle Theory... 

Combined influence of charge diameter and confinement were evaluated by H. Eyring et al (Ref 2, as quoted in Ref 8, p 210) in an extensive comparison of their, "curved front theory of deton zone structure with.the "nozzle theory of H. Jones... 

The metals also present an additional problem in that the product oxide, fluoride, or nitride species may be a solid phase at the combustion temperature or condense during expansion through the rocket nozzle. Figure 2 presents a graphical comparison of the phase properties of the... 

It is observed in the investigation that the liquid to gas mass flow rate ratio, mJmA has little influence on the mean diameter of droplets, as indicated by the exponent of 0.09 on the ratio. In comparison with the results obtained by other researchers [80, 81], the influence exhibited in this investigation is much smaller. The structure of the nozzles of the type Caldyn CSL2 used in the present study being quite different from those used by the mentioned researchers may be the major reason for the difference described above. 

V-mixer - comparison with conventional nozzle mixer... 

From equation n. A. 12. one sees that c is a function of the chamber temperature Tc and the average molecular weight of the combustion products, as well as pc and the dimensions of the nozzle. Since TJ. and M are determined from the given propellant combustion, c is a parameter used for comparing various propellant combinations. However, such comparisons should be under optimum conditions that is, for pe = pa. For this reason ... 

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