area ratio = Avc / A2 where Avc = area in "vena contracta" (m2, ft2) "Vena Contracta" is the minimum jet area that appears just downstream of the restriction. The viscous effect is usually expressed in terms of the non-dimensional parameter Reynolds Number - Re. Due to the Benoulli ...
Introducing the area ratio α = Aj/A, the conservation of mass equation yields U=V−αVj1−α. Then the conservation of momentum equation becomes −αVj2−(V−αVj1−α)2(1−α)+V2=−12(V−αVj1−α)2. This equation may be written in terms of V¯=V/Vj as fo...
where D3,2 is the Sauter mean diameter – the diameter of the droplet that has the same volume to surface area ratio as the entire spray, which will tend to scale with the VMD. This relationship is parameterized for data sets with 0.04<GLR<0.2, 2 × 106<Pin<8 × 106 g/cm*s2, 0....
flow through the nozzle will remain subsonic until the point is reached where the ratiop'2/p1is equal to the critical pressure ratio (p2/p1)c, At this point, flow through the nozzle will be sonic and the pressure at the exit of the nozzle will be the same as the pressure outside the...
3.1 Effect of Nozzle Structure on Flow Velocity in Cutting Area In the process of laser cutting, the velocity of the auxiliary air flow of the nozzle determines the concentration of oxygen at the cutting front. The faster the velocity of the auxiliary air flow, the lower the interference of ...
nozzle row group formula (100), it provides according to the present invention, another nozzle (120) moves right, the roll gap of the central area on the left side is designed as multinomial nozzle, wherein at least one described single smaller control ratio of material type nozzle is than...
A: We will design the most suitable proposal based on your actual situation, such as the daily production,raw material formula, factory layout, etc. Also we would like to intro- duce some excellent suppliers of raw materials, bottles,labels, etc if needed. After sales, enginee...
A: We will design the most suitable proposal based on your actual situation, such as the daily production,raw material formula, factory layout, etc. Also we would like to intro- duce some excellent suppliers of raw materials, bottles,labels, etc if needed. After sales, engineer wi...
In subject area: Engineering The spray tip penetration (STP) is defined as the distance from the nozzle outlet to the spray end, the spray cone angle (SCA) is the angle formed by the spray edges and the nozzle at the 1/2 spray tip penetration, and the spray projected area (SPA) is ...
Some space engines have nozzle expansion ratios (ε, the ratio of nozzle exit area to throat area) exceeding 100. Practically, the expansion ratio is increased until the additional weight of the longer nozzle and the increase in internal nozzle drag losses result in an overall penalty. The ...