back pressure

n 1. (Mechanical Engineering) engineering a. the pressure that opposes the motion of a piston on its exhaust stroke in an internal-combustion engineb. the exhaust pressure in external combustion engines 2. (Pathology) med the local pressure that builds up when fluid flow is obstructed in the cardiovascular or urinary systems

back pressure

[′bak ‚presh·ər] (mechanics) Pressure due to a force that is operating in a direction opposite to that being considered, such as that of a fluid flow. (mechanical engineering) Resistance transferred from rock into the drill stem when the bit is being fed at a faster rate than the bit can cut.

Back Pressure

the pressure of steam or gas at the end of the expansion process in a heat engine, such as a steam or gas turbine or a steam engine. The term “back pressure” is used to define the final pressure that exists when the expansion does not terminate in the condensation of the steam. In a steam turbine with back pressure, the exhaust steam is not condensed and, instead, is used as a source of heat for either an industrial process or another turbine.

back pressure

Pressure developed in opposition to the flow of liquid or gas in a pipe, duct, conduit, etc.; due to friction, gravity, or some other restriction to flow of the conveyed fluid.

back pressure

A pressure exerted backward; in a field of fluid flow, a pressure exerted contrary to the pressure producing the main flow. Specifically, the pressure inside the exhaust system of a reciprocating engine that prevents the flow of burned gases from the cylinders.

back pressure

back pres·sure

pressure exerted upstream in the circulation as a result of obstruction to forward flow, as when congestion in the pulmonary circulation results from stenosis of the mitral valve or failure of the left ventricle.

back pres·sure

(bak presh'ŭr) Pressure exerted upstream in the circulation as a result of obstruction to forward flow, as when congestion in the pulmonary circulation results from stenosis of the mitral valve or failure of the left ventricle.

Patient discussion about back pressure

Q. I have a back pain that started few weeks ago. It's not related to any physical pressure what can it be? Few weeks ago I began to feel a strange pain in my back. Its not an ordinary pain. Its not related to movements, I didn't get hit anywhere, its just a constant pain and a bad feeling of uncomfort in this area.In addition my wife said to me that my skin is yellowish. I must admit that I can't notice it but she and my son claims so.what can it be?For general knowledge I am a 61 years old, i smoke and drink beer but not in a exaggerated way.A. Back pain is one of the most popular symptoms an old man can suffer from. Most of the times it's just back pain. It could be worst things - even cancer, so you should got to your GP BUT, don't worry most of the chances is that it is just a back pain.
as far as i know you can have back pain from sleeping in a bad position, so you can't recall an injury to the back, but you hurt it every time you take a nap.

More discussions about back pressure

单词	back pressure
释义	back pressure back pressure n 1. (Mechanical Engineering) engineering a. the pressure that opposes the motion of a piston on its exhaust stroke in an internal-combustion engineb. the exhaust pressure in external combustion engines 2. (Pathology) med the local pressure that builds up when fluid flow is obstructed in the cardiovascular or urinary systems back pressure back pressure [′bak ‚presh·ər] (mechanics) Pressure due to a force that is operating in a direction opposite to that being considered, such as that of a fluid flow. (mechanical engineering) Resistance transferred from rock into the drill stem when the bit is being fed at a faster rate than the bit can cut. Back Pressure the pressure of steam or gas at the end of the expansion process in a heat engine, such as a steam or gas turbine or a steam engine. The term “back pressure” is used to define the final pressure that exists when the expansion does not terminate in the condensation of the steam. In a steam turbine with back pressure, the exhaust steam is not condensed and, instead, is used as a source of heat for either an industrial process or another turbine. back pressure Pressure developed in opposition to the flow of liquid or gas in a pipe, duct, conduit, etc.; due to friction, gravity, or some other restriction to flow of the conveyed fluid. back pressure A pressure exerted backward; in a field of fluid flow, a pressure exerted contrary to the pressure producing the main flow. Specifically, the pressure inside the exhaust system of a reciprocating engine that prevents the flow of burned gases from the cylinders. back pressure back pres·sure pressure exerted upstream in the circulation as a result of obstruction to forward flow, as when congestion in the pulmonary circulation results from stenosis of the mitral valve or failure of the left ventricle. back pres·sure (bak presh'ŭr) Pressure exerted upstream in the circulation as a result of obstruction to forward flow, as when congestion in the pulmonary circulation results from stenosis of the mitral valve or failure of the left ventricle. Patient discussion about back pressure Q. I have a back pain that started few weeks ago. It's not related to any physical pressure what can it be? Few weeks ago I began to feel a strange pain in my back. Its not an ordinary pain. Its not related to movements, I didn't get hit anywhere, its just a constant pain and a bad feeling of uncomfort in this area.In addition my wife said to me that my skin is yellowish. I must admit that I can't notice it but she and my son claims so.what can it be?For general knowledge I am a 61 years old, i smoke and drink beer but not in a exaggerated way.A. Back pain is one of the most popular symptoms an old man can suffer from. Most of the times it's just back pain. It could be worst things - even cancer, so you should got to your GP BUT, don't worry most of the chances is that it is just a back pain. as far as i know you can have back pain from sleeping in a bad position, so you can't recall an injury to the back, but you hurt it every time you take a nap. More discussions about back pressure EncyclopediaSeeb/p
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