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Performance characteristics of one convergent and three convergent-divergent nozzles

Description: Report presenting the performance characteristics of one convergent and three convergent-divergent nozzles obtained over a range of nozzle pressure ratios. Results regarding one-dimensional flow theory and the performance characteristics themselves are provided.
Date: September 29, 1952
Creator: Krull, H. George & Steffen, Fred W.
Partner: UNT Libraries Government Documents Department
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Effect of plug design on performance characteristics of convergent-plug exhaust nozzles

Description: Report presenting an evaluation of the internal performance characteristics of several plug-type nozzles over a range of pressure ratios from 1.5 to 30. Results regarding isentropic plug nozzles, conical plug nozzles, the effect of throat and throat-approach section on performance, and air-flow parameter are provided.
Date: October 25, 1954
Creator: Krull, H. George & Beale, William T.
Partner: UNT Libraries Government Documents Department
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Effect of outer-shell design on performance characteristics of convergent-plug exhaust nozzles

Description: Report presenting an investigation to determine the effect of outer-shell design variables on the internal performance characteristics of plug-type nozzles designed for a pressure ratio between 6 and 12. Inlet Mach number and outer-shell angle were found to have no effect on nozzle thrust coefficient. For choked flow, the effective throat area decreased when the inlet Mach number or outer-shell angle was increased.
Date: April 21, 1955
Creator: Krull, H. George & Beale, William T.
Partner: UNT Libraries Government Documents Department
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Comparison of two methods of modulating the throat area of convergent plug nozzles

Description: Report presenting an investigation to determine the effect on performance of two methods of throat-area modulation of two convergent plug nozzles. Data were obtained over a range of pressure ratios. Results regarding the performance of the translatable outer-shell-type plug nozzle, performance of the iris-outer-shell-type plug nozzles, sensitivity to throat-area variation, and air-flow parameter are provided.
Date: May 11, 1955
Creator: Krull, H. George & Beale, William T.
Partner: UNT Libraries Government Documents Department
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Effect of burner design variables on performance of 16-inch diameter ram-jet combustor using gaseous-hydrogen fuel

Description: An evaluation of the effect of geometric design variables on the performance of a 16-inch-diameter ram-jet combustor total pressures from 7 to 44 inches of mercury absolute. Equivalent ratio was varied from 0.1 to 1.0 at a combustor inlet temperature of 1100 degrees R.
Date: January 18, 1957
Creator: Krull, H. George & Burley, Richard R.
Partner: UNT Libraries Government Documents Department
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Preliminary investigation of performance of variable-throat extended-plug-type nozzles over wide range of nozzle pressure ratios

Description: From Summary: "As part of an overall program for the experimental investigation of large-scale jet nozzles, a preliminary evaluation of the internal performance characteristics of several variable-throat extended-plug-type nozzles was obtained over a range of nozzle pressure rations from 2 to 15 with nozzle throat variations as great as 2:1. The extended-plug nozzle attained peak thrust coefficients as high as those which have been attained with fixed-geometry convergent-divergent nozzles. The … more
Date: February 5, 1954
Creator: Ciepluch, Carl C.; Krull, H. George & Steffen, Fred W.
Partner: UNT Libraries Government Documents Department
open access

Preliminary investigation of several target-type thrust-reversal devices

Description: Report presenting thrust-reversal performance of several basic target-type jet reflectors of various sizes and with various modifications obtained with unheated air over a range of exhaust-nozzle pressure ratios. Maximum, or near maximum, reversal for any deflector occurred at a spacing which was mechanically feasible and did not affect nozzle air flow.
Date: March 12, 1954
Creator: Steffen, Fred W.; Krull, H. George & Ciepluch, Carl C.
Partner: UNT Libraries Government Documents Department
open access

Internal performance characteristics of variable-throat plug- and vaned-type convergent-divergent nozzles

Description: Investigation of the internal performance characteristics of three types of variable-throat convergent-divergent nozzles over a wide range of pressure ratios. Only small differences in peak thrust coefficient between the three types of variable-throat convergent-divergent nozzles were obtained.
Date: June 23, 1953
Creator: Krull, H. George; Steffen, Fred W. & Ciepluch, Carl C.
Partner: UNT Libraries Government Documents Department
open access

Effects of several geometric variables on internal performance of short convergent-divergent exhaust nozzles

Description: Report presenting an investigation to determine the effects on internal performance of several geometric variables intended to produce a short, high-performance convergent-divergent nozzle. Some of the characteristics investigated included variations in the throat-contour radius, combinations of the shape of the convergent section and throat-contour radius, divergence angle, and shape of the divergent section.
Date: February 18, 1955
Creator: Steffen, Fred W.; Krull, H. George & Schmiedlin, Ralph F.
Partner: UNT Libraries Government Documents Department
open access

Effect of divergence angle on the internal performance characteristics of several conical convergent-divergent nozzles

Description: Report presenting experiments conducted on conical convergent-divergent nozzles having included a range of divergence angles and expansion ratios over a wide range of nozzle pressure ratios with cold flow to determine the effect of divergence angle on the internal performance of the nozzles. Results regarding the performance characteristics, effect of divergence angle on overexpanded performance, and effect of divergence angle on nozzle air-flow characteristics are provided.
Date: November 29, 1954
Creator: Steffen, Fred W.; Krull, H. George & Schmiedlin, Ralph F.
Partner: UNT Libraries Government Documents Department
open access

Effect of several design variables on internal performance of convergent-plug exhaust nozzles

Description: Numerous experiments were conducted to determine factors which affect the internal performance of convergent-plug exhaust nozzles. The results of these experiments, which include effects of such things as plug shape, nozzle inlet Mach number, and outer-shell characteristics, provide a basis for optimum desifn from the standpoint of weight and size. The results also show performance penalties which can result when the nozzle is too small.
Date: October 29, 1956
Creator: Krull, H. George; Beale, William T. & Schmiedlin, Ralph F.
Partner: UNT Libraries Government Documents Department
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