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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722341626
Category :
Languages : en
Pages : 30
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Book Description
An overview of liquid lubricants for use in current and projected high performance turbojet engines is discussed. Chemical and physical properties are reviewed with special emphasis placed on the oxidation and thermal stability requirements imposed upon the lubrication system. A brief history is given of the development of turbine engine lubricants which led to the present day synthetic oils with their inherent modification advantages. The status and state of development of some eleven candidate classes of fluids for use in advanced turbine engines are discussed. Published examples of fundamental studies to obtain a better understanding of the chemistry involved in fluid degradation are reviewed. Alternatives to high temperature fluid development are described. The importance of continuing work on improving current high temperature lubricant candidates and encouraging development of new and improved fluid base stocks are discussed. Loomis, William R. and Fusaro, Robert L. Glenn Research Center RTOP 505-63-5A...
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722341626
Category :
Languages : en
Pages : 30
Get Book Here
Book Description
An overview of liquid lubricants for use in current and projected high performance turbojet engines is discussed. Chemical and physical properties are reviewed with special emphasis placed on the oxidation and thermal stability requirements imposed upon the lubrication system. A brief history is given of the development of turbine engine lubricants which led to the present day synthetic oils with their inherent modification advantages. The status and state of development of some eleven candidate classes of fluids for use in advanced turbine engines are discussed. Published examples of fundamental studies to obtain a better understanding of the chemistry involved in fluid degradation are reviewed. Alternatives to high temperature fluid development are described. The importance of continuing work on improving current high temperature lubricant candidates and encouraging development of new and improved fluid base stocks are discussed. Loomis, William R. and Fusaro, Robert L. Glenn Research Center RTOP 505-63-5A...
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
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Book Description
Author: William R. Loomis
Publisher:
ISBN:
Category : Aircraft gas-turbines
Languages : en
Pages : 28
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Book Description
Feasibility tests on liquid lubricants for inerted lubrication systems of advanced aircraft engines.
Author: William R. Loomis
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 20
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Book Description
Author: Society of Automotive Engineers, Inc
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Guiliano Pezzella
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 558
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 2
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Book Description
Author: I. E. Sumey
Publisher:
ISBN:
Category :
Languages : en
Pages : 161
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Book Description
Although ester-base lubricants have best met the requirements of gas turbine engines to date, growth in upper temperature capability seems limited. Plans have been to stress development of MIL-L-27502, a 450F ester-class lubricant. Other chemical types of lubricants exist with much higher temperature capability such as polyphenyl ether and perfluoro-carbon types. But these fluids exhibit poor low temperature pumpability characteristics and have other disadvantages relative to esters. The question arises as to how and to what degree these lubricants or any other advanced lubricants may influence turbine engine design. A study was conducted to determine to what extent hypothetical lubricant properties affect the design of gas turbine engines. The program showed that elevation of bulk oil stability temperature capability has the greatest single impact of any of the several properties studied, and therefore supports the direction taken by MIL-L-27502. A balanced effort on other lubricant properties and supporting materials and design technology must be maintained however, to prepare for the advanced aircraft for the next decade, if lubricants other than esters are to be exploited. (Author).
Author: CE. Snyder
Publisher:
ISBN:
Category : Antioxidant
Languages : en
Pages : 8
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Book Description
Military and commercial jet aircraft engines operate hotter than in the past to increase fuel efficiency. Also, advanced structural engine materials permit hotter burning, more efficient engines. These trends are expected to continue. Many current gas turbine engines experience oil system coking and other problems related to the limited thermal and oxidative stability of the conventional, ester-based gas turbine engine oils. This is because most engines operate on gas turbine oils limited to 150°C. The best current oils have a maximum operating temperature of about 200°C. We initiated a program to develop a new class of ester-based lubricants to meet current and future high-temperature requirements. The target temperature range of this new oil is -40°C to 232°C. Target requirements were established and communicated to industry. This paper presents those requirements and initial results on the most promising candidates.
