High temperature combustor liner

Abstract

A combustor shield assembly is provided wherein a plurality of ceramic tiles are mounted on a ceramic support panel, which panel has a plurality of keyhole-shaped apertures therethrough to receive a plurality of ceramic tiles, each of which has a knob upstanding on a neck from the base or shield of such tile, each of the knobs being sized to fit through the larger end of the apertures, but not the smaller end thereof to provide a bearing and support surface for such knob and thus for the tiles. An apertured retaining panel is provided, having apertures slightly larger than the knobs, which panel is positioned over the top of the support panel with the apertures thereof around the respective knobs to secure the tiles in place in the support panel. A plurality of the so-assembled tiles on their respective support panel are mounted in spaced overlapping layers to a combustor liner so as to mount the tiles before the liner as a heat shield therefor. In addition air inlet passages are provided between each such tile assembly so that cooling air can be input between the above tile assembly layers to further cool and protect the combustor liner in concert with such tile assemblies. In a preferred embodiment, an insulating layer or blanket is positioned on the back side of each tile around its support knob, between tile and support panel to further insulate such panel and provide a cushion for the brittle ceramic tiles.