Two different values of jet diameter (4 mm, 8 mm), of air velocity at nozzle exit (110 m/s, 140 m/s), of jet-to-jet spacing (40 mm, 60 mm), of jet-to-plate distance (40 mm, 60 mm) and of nozzle height (20 mm, 60 mm) are considered.
It is found that the substrate has a substantial effect on the last 20 mm of the jet.
An investigation is reported on the parametric effects on the dynamic characteristics of droplets of jet-impingement angle (40 90°) and pre-impingement distances (2.5 7.5 mm), for a range of jet Weber numbers (20<Wej<500).
Test conditions included ethylene- and propane-fueled flames burning in still air at an ambient temperature of 300 K, ambient pressures of 35 130 kPa, initial jet diameters of 1.6 and 2.7 mm, and jet exit Reynolds numbers of 45 170.
Three different-sized nozzles with inner diameters of 5, 6, and 8 mm were employed and the ranges of jet exit velocities and Reynolds and Froude numbers considered were 5 137 m/s, 8970 83876, and 315 384791, respectively.
As the length of jet pipe decreased to 100 mm, the detonation frequency increased to 35 Hz.
However, recent testing of the 50 mm Rockeye munitions has shown a large undesirable variability of jet tip characteristics.
In terms of jet fuel and diesel, the smoking point decreased by 1 mm, and the cetane number was reduced by 3 units.
For single one row of jet holes, an optimal H/d of 4.5 was determined under Rej = 51,021 and d = 2 mm, for which the jet impingement achieved the best heat transfer performance.
A brief treatment of jet streams follows.
The coming of jet transport stimulated competition.
