From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The effects of cavitation and pressure within a fluid system due to restrictions.
| Identifier | ExFiles\Box 24\5\ Scan215 | |
| Date | 13th January 1930 | |
| -2- Hs{Lord Ernest Hives - Chair}/AD.1/AL.13.1.30.Contd. system over 2500 r.p.m., when this takes place, the flow does not cease altogether but is only reduced slightly from what it would be were there no cavitation. As soon as cavitation starts, the depression in the suction side drops, immediately the depression drops, the flow commences again, thus an intermitt -ent flow takes place. The effect of the restriction on this cavitation is that the flow is reduced to a point where cavitation does not take place normally so that no advantage is obtained. As a check on our results the water flow through the top pipe was plotted against the depression on the suction side of the pump; we should expect these figures to fall on one line irrespective of temperature flow or restriction. We also give a curve showing the pressure in the cylinder jackets and joints due to the use of a restriction on the radiator side of the engine, we should not expect our rubber conn -ections to have a very long life under this pressure. The restriction valve (coupled up to the radiator shutters) to LeC. 2675 puts up a pressure in the system even when fully open; now that exhaust heating is to be used on the uptake bend such a scheme is unnecessary. Hs{Lord Ernest Hives - Chair}/AJL. | ||