Efficiency Tests of a Single-stage Impulse Turbine Having an 11.0-inch Pitch-line Diameter Wheel with Air as the Driving Fluid


Book Description

Results are presented of efficiency tests on a single-stage impulse turbine having an 11.0-inch pitch-line diameter wheel and a fabricated nozzle diaphragm using air at moderate temperatures as the driving fluid. Efficiency curves are shown for turbine pressure ratios from 1.2 to 5.2. The maximum efficiency occurred at a blade-to-jet speed ratio of approximately 0.4 and was about 0.615 for turbine pressure ratios from 3.0 to 4.6. Additional curves of the air-flow data are presented.




The Performance of a Single-stage Impulse Turbine Having an 11.0-inch Pitch-line Diameter Wheel with Cast Airfoil-shaped and Bent Sheet-metal Nozzle Blades


Book Description

Efficiency tests have been made on a single-stage gas turbine having an 11.0-inch pitch-line diameter wheel and a nozzle diaphragm with cast airfoil-shaped nozzle blades using atmospheric air as the driving fluid. A comparison of these tests with previous tests made on the same turbine but with a nozzle diaphragm having fabricated bent sheet-metal blades is given.




The Effect of Inlet Temperature and Pressure on the Efficiency of a Single-stage Impulse Turbine Having a 13.2-inch Pitch-line Diameter Wheel


Book Description

Efficiency tests have been conducted on a single-stage impulse turbine having a 13.2-inch pitch-line diameter wheel and a cast nozzle diaphragm over a range of turbine speeds from 3000 to 17,000 rpm pressure ratios from 1.5 to 5.0, inlet total temperatures from 1200 to 2000 degrees R, and inlet total pressures from 18 to 59 inches of mercury absolute. The effect of inlet temperature and pressure on turbine efficiency for constant pressure ratio and blade-to-jet speed ratio is correlated against a factor derived from the equation for Reynolds number. The degree of correlation indicates that the change in turbine efficiency with inlet temperature and pressure for constant pressure ratio and blade-to-jet speed ratio is principally a Reynolds number test.




Wartime Report


Book Description




The Effect of Inlet Pressure and Temperature on the Efficiency of a Single-stage Impulse Turbine Having an 11.0-inch Pitch-line Diameter Wheel


Book Description

Efficiency tests have been conducted on a single-stage impulse turbine having an 11.0-inch pitch-line diameter wheel with inserted buckets and a fabricated nozzle diaphragm. The tests were made to determine the effect of inlet pressure, inlet temperature, speed, and pressure ratio on the turbine efficiency. An analysis is present that relates the effect of inlet pressure and temperature to the Reynolds number of the flow. The agreement between the analysis and the experimental data indicates that the changes in turbine efficiency with inlet pressure and temperature may be principally a Reynolds number effect.
















Gas Turbine Engineering Handbook


Book Description

The Gas Turbine Engineering Handbook has been the standard for engineers involved in the design, selection, and operation of gas turbines. This revision includes new case histories, the latest techniques, and new designs to comply with recently passed legislation. By keeping the book up to date with new, emerging topics, Boyce ensures that this book will remain the standard and most widely used book in this field. The new Third Edition of the Gas Turbine Engineering Hand Book updates the book to cover the new generation of Advanced gas Turbines. It examines the benefit and some of the major problems that have been encountered by these new turbines. The book keeps abreast of the environmental changes and the industries answer to these new regulations. A new chapter on case histories has been added to enable the engineer in the field to keep abreast of problems that are being encountered and the solutions that have resulted in solving them. - Comprehensive treatment of Gas Turbines from Design to Operation and Maintenance. In depth treatment of Compressors with emphasis on surge, rotating stall, and choke; Combustors with emphasis on Dry Low NOx Combustors; and Turbines with emphasis on Metallurgy and new cooling schemes. An excellent introductory book for the student and field engineers - A special maintenance section dealing with the advanced gas turbines, and special diagnostic charts have been provided that will enable the reader to troubleshoot problems he encounters in the field - The third edition consists of many Case Histories of Gas Turbine problems. This should enable the field engineer to avoid some of these same generic problems