HEAT TRANSFER TO A LAMINAR FLOW OF TOLUENE OF SUPERCRITICAL PRESSURE IN THE REGION OF DEVELOPMENT OF HIGH-FREQUENCY THERMOACOUSTIC INSTABILITY Ch. M. Verdiev UDC 536.242:532.542.4 Results and the procedure of an experimental investigation of heat transfer in combination with high-frequency thermoacoustic self-oscillations of the pressure of toluene, tliq < tm, tw / tm = 1.15-1.90 are presented. A criterial heat transfer equation in a vast region of excitation of thermoacoustic pressure self-oscillations is proposed, and the boundary for the onset of the development of the oscillatory process is found. JEPTER7492019996 JEPTER749206