Aero-engine derivative

Horlock, J.H. (1997), Aero-engine derivative gas turbines for power generation thermodynamic and economic perspectives, ASME Journal of Engineering for Gas Turbines and Power 119(1), 119-123,... 

Gas turbines can be classified as industrial or frame machines and aero-derivative machines that are lighter weight units derived from aircraft engines. Table 23.2 compares the characteristics of the two broad classes of gas turbine machines. 

Distributed generation is modular generation. DG units are less than 60 MW in size and usually located near the point of use. Technologies available for DG include industrial and aero-derivative gas turbines, reciprocating engines,... 

The introduction and development of gas turbine engines led to the development of new lubricants. While the early gas turbine engines ran successfully on mineral oil lubricants, and in fact many Russian aircraft engines still operate on such lubricants, the demand for higher specific thmst, with the concomitant high operating temperatures, needed lubricants with better thermal stability. Carboxylic esters were developed which, with yet further improvements, are still used today. These lubricants are also used in aero-derived industrial and marine gas turbines, meaning that for the first time lubricants developed for aircraft were used in other applications. 

Defence Standard 91-101. Lubricating Oil, Gas Turbine Engine, Synthetic Grade 5 cSt, NATO Code 0-156, Joint Service Designation OX-27and OX-28. UK Defence Standardization. SAE AS5780A. Specification for Aero and Aero-Derived Gas Turbine Engine Lubricants. SAE International. 

In order to verify that the RFS technique can detect, particles greater than 10 pra, the U.S. Department of Defense Joint Oil Analysis Program Technical Support Center (JOAP-TSC) prepared samples using M50 alloy particles. M50 alloy is often present in aero-derivative turbines. Some failure modes of J52 engines appear to be sudden catastrophic failures where the root cause began with the lack of lubrication of the 4 A bearing area. Initially, analysis of the samples by RDE spectroscopy did not indicate the failure mode [6]. The composition and specifications for MSO alloy are as shown below (Table 3). 

Two-shaft systems are generally those which use aero-derivative engines as gas generators ,... 

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