Operating Experience With Gas-Turbine Ships of the Maritime Administration

The two year operating results of the open cycle-gas turbine propulsion plant in the John Sergeant are given with reference to the actual performance, economy, and durability of the components of this marine drive. The operational records show that this type engine can compete favorably with conventional propulsion systems. Similarly, the operating results of the free piston gas-turbine propulsion plant in the William Patterson are given with limited operational experience at this time. The free-piston-installation operating record is submitted as preliminary.

Design Considerations for Nuclear-Aircraft Gas-Turbine Engines

Many new design considerations are encountered in the design of nuclear aircraft gas-turbine engines. The effect that the power-plant configurations, the cycle, radiation level, residual radiation, and nuclear heating have on the design is discussed in this paper.

Operating Experience in the Petro-Chemical Industry

The industrial gas turbine has gained acceptance in the petro-chemical industry (with its multipurpose cycle) and is now finding increasing application in this field. The reliability of this prime mover has been of paramount importance in petro-chemical applications and it is the purpose of this paper to report operating experience establishing this phase together with the improvement in thermodynamic cycle performance.

Application of Electrical Analog Theory in the Preliminary Design of Air-Cooled Turbines

The demand for increased performance in turbojet engines has necessitated an increase in the operating temperatures of various engine components. To this end, metallurgical engineers have made significant improvements in the properties of high-strength metals. The metallurgical state-of-the-art, however, is not sufficient to satisfy the requirements of the propulsion engineer. The air-cooled turbine, therefore, has been developed. The higher operating temperature levels require a more critical study of temperature distribution and of the resultant operating stresses in the blading. The utilization of the analogy between heat flow and electrical flow is described herein as the basis for a method of determining the chordwise-temperature distribution and heat-transfer rates in the air-cooled turbine blades. A general review of the mathematical derivation of analog theory is included and a hypothetical problem is solved. It is to be noted that the technique is not restricted solely to the turbine problem, but can be applied to any steady-state problem which satisfies the specified conditions. Additional analog examples are cited, including techniques for determination of the velocity and pressure distribution around the turbine blade and the temperature distribution in an air-cooled turbine disk.

Rotary Regenerators for the Whirlfire Vehicular Turbines

The major considerations in the selection, design and development of a rotary regenerator for a vehicular gas turbine are discussed. The performance results, such as effectiveness, pressure loss and leakage of the regenerator in the General Motors Research GT-305 gas-turbine engine are presented in detail. A method for evaluating new heat-exchanger surfaces and the techniques used in developing the regenerator are also included.

Performance Analysis of Plug Nozzles for Turbojet and Rocket Exhausts

An attractive feature of the plug-type nozzle for turbojets and rocket jets is that it can automatically adjust its effective exit area with operating pressure ratio and achieve a high level of efficiency over a wide range of operating pressure ratio without variation of mechanical shape. The design and off-design performance analysis of such nozzles is described.

Development of the Bristol Proteus Turboprop to 2000 Hr Life Between Overhauls

Airplane experience with the Bristol Proteus engine in the Britannia from the start of passenger services up to its present overhaul life of 2000 hr and a dsscussion of the basic reliability and safety features of the engine.

Description and Service Experience of Various Boeing Gas-Turbine Marine Applications

This paper gives a brief description of the Boeing small gas-turbine engine and describes the various marine applications, both propulsion and auxiliary, in which these engines have served. A discussion is included concerning the major problems and corrective action associated with the initial marine service of the latest production model engine, the 502-10C. The paper concludes with a summary of service analysis data of the 502-10C engine in marine applications.

The Past, Present and Future of a Pipeline Gas Turbine

El Paso reviews its experience with the gas turbine. Requirements set forth, and how they have been fulfilled are discussed along with problems encountered with respect to design, operation, and maintenance. Desirable improvements in the gas turbine and associated equipment are also discussed.

A Transport Aft-Turbofan

This paper presents the technical status of a new type aft-turbofan aircraft powerplant, designated as the General Electric CJ805-21. The successful development to date of this aft-fan engine has amply demonstrated the feasibility of a major increase in power rating and a significant improvement in altitude cruise fuel economy by converting the CJ805-3 commercial turbojet to an aft-turbofan engine. The advanced technology, performance capabilities, development and maintenance factors emphasize the importance of the CJ805-21.