Experimental and numerical investigations in the near-burner region of a versatile multi-fuel burner. - Nikolaos Orfanoudakis; A. Hatziapostolou; K. Krallis; K. Sardi; Nikolaos W. Vlachakis; St. A. Mavromatis; V. D. Tsoukalas (J. Comput. Methods Sci. Eng., 2007)