Papers on the effect of water on centrifugal compressors ( such as a
turbo ).

Analysis of thrust augmentation of turbojet engines by water injection
at compressor inlet including charts for calculating compression
processes with water injection 
Wilcox, E. Clinton. , Trout, Arthur M. , Lewis Flight Propulsion
Laboratory, Cleveland, Ohio. 
NACA Report 1006, NACA Technical Note 2104, NACA Technical Note 2105, 20
pp. , 1951 
A psychrometric chart having total pressure (sum of partial pressures of
air and water vapor) as a variable, a Mollier diagram for air saturated
with water vapor, and charts showing the thermodynamic properties of
various air-water vapor and exhaust gas-water vapor mixtures are
presented as aids in calculating the thrust augmentation of a turbojet
engine resulting from the injection of water at the compressor inlet.
Curves are presented that show the theoretical performance of the
augmentation method for various amounts of water injected and the
effects of varying flight Mach number, altitude, ambient-air
temperature, ambient relative humidity, compressor pressure ratio, and
inlet-diffuser efficiency. Numerical examples, illustrating the use of
the psychrometric chart and the Mollier diagram in calculating both
compressor-inlet and compressor-outlet conditions when water is injected
at the compressor inlet, are presented. 
http://naca.larc.nasa.gov/reports/1951/naca-report-1006/ 


Experimental evaluation by thermodynamic methods of work input to a
centrifugal compressor operating with water injection 
Kovach, Karl. , Beede, William L. , Hamrick, Joseph T. , Lewis Flight
Propulsion Laboratory, Cleveland, Ohio. 
NACA Research Memorandum E50J31, 14 pp. , 1951 
(abstract not available) 
http://naca.larc.nasa.gov/reports/1951/naca-rm-e50j31/ 


Evaluation of centrifugal compressor performance with water injection 
Beede, William L , Hamrick, Joseph T , Withee, Joseph R , Jr 
NACA RM-E51E21, , 1951 
The effects of water injection on a compressor are presented. To
determine the effects of varying water-air ratio, the compressor was
operated a t a constant equivalent impeller speed over a range of
water-air ratios and weig ht flows. Operation over a range of weight
flows at one water-air ratio and two inlet air temperatures was carried
out to obtain an indication of the effects of varying inlet air
temperature. Beyond a water-air ratio of 0.03 there was no in crease in
maximum air-weight flow, a negligible rise in peak total-pressure rati
o, and a decrease in peak adiabatic efficiency. An increase in inlet air
tempera ture resulted in an increase in the magnitude of evaporation. An
analysis of dat a indicated that the magnitude of evaporation within the
compressor impeller was small. 
http://naca.larc.nasa.gov/reports/1951/naca-rm-e51e21/ 


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A mixture of methyl and ethyl alcohol and water with optimized spark
advance on engines running in excess of 225 lbs bmep.

Effect of water-alcohol injection and maximum economy spark advance on
knock-limited performance and fuel economy of a large air-cooled
cylinder 
Heinicke, Orville H 
NACA WR-E-264 NACA-MR-E5H12 
August 1945