The paper describes the development of a parametric 3D CAD assembly of a small-size GTD combustion chamber. Based on the chamber model, we derive the internal CAD volume of the designed single-burner sector. The created parametric models are auto-adjustable by an external excel spreadsheet controlling their parameters. The 3D combusion chamber assembly and the single-burner sector can further be used for optimizing the geometry of flame tubes and nozzles, arranging the sustainable fuel burning space, for the spatial distribution of air flows, and for other design tasks
