Communication to : 13th International symposium on airbreathing engines (ISABE), Chattanooga (USA), September 07-12, 1997SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 22419, issue : a.1997 n.147 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc