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Effect of NACA Injection Impeller on Mixture Distribution of Double-Row Radial Aircraft Engine

Marble, Frank E. and Ritter, William K. and Miller, Mahlon A. (1945) Effect of NACA Injection Impeller on Mixture Distribution of Double-Row Radial Aircraft Engine. National Advisory Committee on Aeronautics , Washington, DC.

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The NACA injection impeller was developed to improve the mixture distribution of aircraft engines by discharging the fuel from a centrifugal supercharger impeller and thus to promote a thorough mixing of fuel and charge air. Experiments with a double-row radial aircraft engine indicated that for the normal range of engine power the NACA injection impeller provided marked improvement in mixture distribution over the standard spray-bar injection system used in the same engine. The mixture distribution at cruising conditions was excellent; at 1200, 1500, and 1700 brake horsepower, the differences between the fuel-air ratios of the richest and the leanest cylinders were reduced to approximately one-third their former values.

Item Type:Report or Paper (Technical Report)
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URLURL TypeDescription
Miller, Mahlon A.0000-0002-3964-9312
Additional Information:No copyright.
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NACA Technical Report821
Record Number:CaltechAUTHORS:20140805-132115205
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47994
Deposited By: George Porter
Deposited On:05 Aug 2014 21:32
Last Modified:09 Mar 2020 13:19

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