Recalculation of air turborocket performance

Abstract

The turborocket engine has been proposed for use in very-high-speed vehicles, such as Earth-to-orbit launchers. The pure ramjet engine can't work at low Mach numbers, while the turbojet engine has poor performance at high Mach numbers because of the limitation of turbine inlet temperature. The turborocket engine improves weak points of both engines, it has one or two stage fans which work at low Mach numbers and turbines which use independent gas from free stream air. The turborocket engine has been introduced in the standard textbook of Dr. Jack L. Kerrebrock's “Aircraft Engines and Gas Turbines” , but unfortunately there are some misunderstandings and miscalculation of the engine performance. The engine performance of his book is too high. The text book is not revised though it used worldwide, so this paper is one of the proposal of correction of chapter 10.8 of the book.