Since flame modes, lift-off and stability are of much practical importance in the design of burners, these characteristics of the jet flames in a cross-flow at normal temperatures have been studied. Regarding general characteristics at high temperature, however, little research has been reported, even though many practical burners utilize the benefits of high temperature. This study investigates the general characteristics of the jet flames in a cross-flow at high temperature. The characteristic flame modes observed Lire found to be fundamentally different from those at normal temperature, and the lift-off behaviour could be understood through the premixed concept, including the effects of the large structure. Jet flames in a cross-flow behave differently from those at normal temperature, and the distinct characteristics should be considered in the design of each burner. (C) 2003 Published by Elsevier Ltd.