**total pressure** — The sum of dynamic and static pressures. Also called total head pressure … Aviation dictionary

**head, total** — The total head of a liquid at a given point is the sum of three components: (a) the elevation head, which is equal to the elevation of the point above a datum, (b) the pressure head, which is the height of a column of static water that can be… … Lexicon of Cave and Karst Terminology

**Head** — A unit of pressure for a fluid, commonly used in water pumping and hydropower to express height a pump must lift water, or the distance water falls. Total head accounts for friction head losses, etc. *** The product of the water s weight… … Energy terms

**pitot pressure** — The sum of dynamic and static pressure. It is used to measure air speed. The pitot tube faces the airflow and the pitot pressure is fed into it. Also known as total head pressure, stagnation pressure, ram air pressure, and impact pressure … Aviation dictionary

**Pressure retarded osmosis** — (PRO) is the salinity gradient energy retrieved from the difference in the salt concentration between seawater and river water. In PRO, the water potential between fresh water and sea water corresponds to a pressure of 26 bars. This pressure is… … Wikipedia

**Pressure** — This article is about pressure in the physical sciences. For other uses, see Pressure (disambiguation). Pressure as exerted by particle collisions inside a closed container … Wikipedia

**Hydraulic head** — is a specific measurement of water pressure or total energy per unit weight above a geodetic datum. It is usually measured as a water surface elevation, expressed in units of length, but represents the energy at the entrance (or bottom) of a… … Wikipedia

**inlet pressure** — i. The total pressure taken in the engine inlet as a measure of air density. This parameter is sent to the fuel control for fuel scheduling. It is normally known as P1 pressure. ii. As it relates to the performance data on pumps, when not… … Aviation dictionary

**stagnation pressure** — The pressure at the stagnation point. It is the same as the total head or pitot pressure (i.e., the sum of the local atmospheric pressure and the dynamic pressure) … Aviation dictionary

**low-pressure pump** — A pump used for low total heads; in the case of centrifugal pumps the low pressure pump has a nominal total head not exceeding 80 m … Dictionary of automotive terms