Conical helical of spiral combustor scroll device in gas turbine engine

A turbine scroll of a turbine engine comprising:

• a combustion exhaust inlet;
• a combustion exhaust product discharge area defining a B-width;
• and
• an axial shift region providing a portion of said turbine scroll to have a irregular cross-sectional area centroid passing beyond said B-width;
• wherein said turbine scroll has a helical configuration and
• wherein said irregular cross-sectional area has a flat curve portion curving around said helical configuration.

A turbine scroll of a turbine engine comprising:

• a combustion exhaust inlet;
• a combustion exhaust product discharge area defining a B-width;
• and
• an axial shift region providing a portion of said turbine scroll to have an irregular cross-sectional area centroid passing beyond said B-width;
• wherein
• said turbine scroll has a helical configuration;
• said turbine scroll has a conical shape with a cross-sectional area decreasing from said combustion exhaust inlet to said combustion exhaust product discharge area;
• and
• said irregular cross-sectional area has a flat curve portion curving around said helical configuration.

A turbine engine comprising a turbine scroll having a combustion exhaust inlet;

• a combustion exhaust product area defining a B-width;
• and an axial shift region providing a portion of said turbine scroll to have a cross-sectional area centroid passing beyond said B-width, wherein said combustion scroll has a helical configuration;
• said turbine scroll has a conical shape with a cross-sectional area decreasing from said combustion exhaust inlet to said combustion exhaust product discharge area;
• and
• said cross-sectional area has a flat curve portion curving around said helical configuration.

A turbine engine comprising a turbine scroll having a combustion exhaust inlet, a combustion exhaust product discharge area defining a B-width, and an axial shift region providing a portion of said turbine scroll to have an irregular cross-sectional area centroid passing beyond said B-width, wherein

• said turbine scroll has a helical configuration;
• said turbine scroll has a substantially conical shape with a cross-sectional area decreasing from said combustion exhaust inlet to said combustion exhaust product discharge area;
• and
• said irregular cross-sectional area has a flat curve portion curving around said helical configuration.

A method for making a turbine engine comprising:

• attaching a first, combustion exhaust inlet end of a turbine scroll to a combustor liner of said turbine engine;
• attaching a second, opposite end of said turbine scroll to a combustion exhaust product discharge area defining a B-width;
• providing an axial shift region in said turbine scroll, said axial shift region resulting in a portion of said turbine scroll having an irregular cross-sectional area centroid passing beyond said B-width;
• and
• shaping said turbine scroll in a helical configuration.

A method for making a turbine engine comprising:

• attaching a first, combustion exhaust inlet end of a turbine scroll to a combustor liner of said turbine engine;
• attaching a second, opposite end of said turbine scroll to a combustion exhaust product discharge area defining a B-width;
• providing an axial shift region in said turbine scroll, said axial shift region resulting in a portion of said turbine scroll having an irregular cross-sectional area centroid passing beyond said B-width;
• and
• shaping said turbine scroll in a helical configuration;
• and
• forming said irregular cross-sectional area with a flat curve portion curving around said helical configuration.