Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| techtalk:ref:engmech07c [2020/10/02 15:37] – hippysmack | techtalk:ref:engmech07c [2023/12/26 21:18] (current) – hippysmack | ||
|---|---|---|---|
| Line 3: | Line 3: | ||
| ====== Differential Pressure ====== | ====== Differential Pressure ====== | ||
| - | Vacuum pressure (negative) and air pressure (positive) are the terms that describe the amount of molecules of a gas in a given unit of space. ((Dr Dick of the XLFORUM | + | Vacuum pressure (negative) and air pressure (positive) are the terms that describe the amount of molecules of a gas in a given unit of space. ((Dr Dick of the XLFORUM |
| More molecules inside the engine than outside = inside air pressure. \\ | More molecules inside the engine than outside = inside air pressure. \\ | ||
| Less molecules inside the engine than outside = inside is vacuum pressure. \\ | Less molecules inside the engine than outside = inside is vacuum pressure. \\ | ||
| Line 21: | Line 21: | ||
| That restriction is on purpose to lessen the pumping losses by being closer to #1 than to #2. \\ | That restriction is on purpose to lessen the pumping losses by being closer to #1 than to #2. \\ | ||
| - | As the vacuum increases, the pumping losses decrease and the fluid is less dense. ((Dr Dick of the XLFORUM | + | As the vacuum increases, the pumping losses decrease and the fluid is less dense. ((Dr Dick of the XLFORUM |
| On the flip side, less dense fluid can't suspend as much liquid (possibly resulting in more liquid drag). | On the flip side, less dense fluid can't suspend as much liquid (possibly resulting in more liquid drag). | ||
