A narrow or restrictive exit will obviously create a lot of
back pressure (unwanted effect), but this in turn also means that the exhaust gases will have a higher escape velocity coming out of the engine (desired effect).
In a metering pump system, using a
back pressure valve alone does nothing to improve fluid flow.
Apart from the runner length, runner volume, collector,
back pressure and exhaust pulse, the physical shape of the manifold also has significant impact on exhaust velocity.
For good landings, pilots need to have what I call a fine pitch control--not too much, not too little
back pressure.
The
back pressure of blood in the aorta against the heart's aortic semilunar valve is higher than that against the pulmonic semilunar valve of the pulmonary trunk.
5 minutes, with the same separation quality and
back pressure of only 153 bar.
If the tank is located lower than the chilled water system piping, CV-5 and CV-6 could modulate to control
back pressure.
Blood vessels in the gullet had exploded because of
back pressure from my liver after drinking too much.
The leaked report stated the incident involved
back pressure in one of the furnaces.
Its flapper technology allows high pressures to be achieved (up to 116 psi) at large orifice sizes while preventing the fluid contamination that can result from spikes in
back pressure inherent in analytical devices.
VARICOSE VEINS These are knobbly swellings of veins where blood pools due to
back pressure and damage to valves within the veins that prevent backward flow of blood.
Black color streaks were present with increased
back pressure and when the color concentrate loading was increased from about 2 to 5%.
