The comparative performance of Roots type aircraft engine superchargers as affected by change in impeller speed and displacement (1929)
NASA Technical Reports Server (NTRS) · leaf 8
ugh the impeller-case clearances, but it does affect the ratio of these two components. The amount of air delivered decreases with increased clearance, as is shown in Figure 4. The amount of air that is lost in slip increases with the clearance since the slip speed increases with clearance, as… … 1000 2000 3000 4000 6000 ™°° Fig. 5.—Temperature-pressure relations as affected by impeller displace- Impeller R.P.M. ment and speed. Plotted on a logarithmic scale Fig. 4.—Rate of air delivery as affected by impeller displacement, speed, pressure difference, and clearance j slip, i. e., that air…
NASA Technical Reports Server (NTRS)
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