Khairul Zaman

Dr. Khairul Zaman is currently an Aerospace Engineer in the Aeropropulsion Division of NASA Glenn Research Center. He joined NASA in 1982, initially working at the Langley Research Center and moving to GRC in 1985. Dr. Zaman received his PhD degree in Mechanical Engineering from the University of Houston in 1978. His PhD and postdoctoral work, under the mentorship of Professor Fazle Hussain, led to a series of publications addressing the dynamics of coherent structures in shear layers and jets. At NASA Dr. Zaman continued and extended these studies to higher Mach number shear flows, particularly with respect to jet noise mechanisms and control. These studies played a pivotal role leading to chevron technology employed in modern jet engines, a technique for suppression of howl in ground test facilities, in addition to addressing such fundamental phenomena as transonic tones and excess broadband noise in overexpanded jets, guided jet waves and their impact on jet noise, and the effect of