Pintle injector tip with active cooling

US7503511B2 · kind B2 · utility

Assignee

• Space Exploration Technologies Corp. · US

Inventor

• Thomas Mueller · Lappersdorf, DE

Key dates

• Filing date: Aug 4, 2005
• Grant date: Mar 17, 2009
• Expiry date: Aug 10, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E20/34
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A bi-propellant rocket engine may include a primary propellant flowing in a central passageway, a secondary propellant flowing in a secondary passageway generally coaxial with central passageway and a pintle tip having a central chamber sidewall coaxial with the primary passageway and surrounding a central chamber, the central chamber sidewall having a first plurality of apertures there through so that some of the primary propellant exits the central chamber transverse to the flow of the secondary propellant in the secondary passageway. The pintle tip may have a secondary chamber sidewall, substantially thicker than the primary chamber sidewall, surrounding a secondary chamber downstream of and in fluid communication with the primary chamber, the secondary chamber sidewall having a second plurality of apertures there through so that some of the primary propellant exits the secondary chamber transverse to the flow of the secondary propellant in the secondary passageway. The pintle tip may have an end wall generally traverse to the flow of the primary propellant in the central passageway and adjacent the secondary chamber sidewall so that the flow of primary propellant through the se…