innovative fuel injector utilizing casi technology for meso-scale rocket

Ahmad Hussein Abdul Hamid*, Wan Mohd Fairuz Wan Mamat, Zulkifli Abdul Ghaffar, P.M. Dr. Rahim AtanFaculty of Mechanical EngineeringUniversiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.* hussein_14@yahoo.com

Innovative fuel injector utilizing CASI technology for meso-scale rocket

Conventional fuel injectors supply pressurized fuel via orifices so that the resulting streams intersect with each other and break up into

small droplets. However, this type of injector will reduce the resident time of fuel in the combustion chamber. As a result, unburned fuels

are thrown out from the engine. An innovative injector was developed and it is named Compact Advanced Swirl Injector (CASI). As its

name implies, the CASI supply fuel in a swirling spray form. The swirl generator is the central key feature of the CASI technology, which

enables robust mixing of fuel/oxidizer, flame stabilization and flame propagation that produces near complete combustion over a wide

range of compact combustor lengths and diameters. Swirl enhanced combustion produces significantly greater performance, on less

fuel, than conventional engines of similar size. There is great potential for transferring this "State Of The Art" technology from rocket

propulsion engines to automotive engines.

OBJECTIVES

To design and fabricate compact swirl injector for rocket applicationTo design and fabricate compact swirl injector for rocket application To investigate the effect of injector element on the To investigate the effect of injector element on the rocket performancerocket performance

NOVELTY

The injector utilizing CASI technology is an innovative product that is The injector utilizing CASI technology is an innovative product that is superior to traditional injectors in a way that it supply fuel in a swirling superior to traditional injectors in a way that it supply fuel in a swirling spray form to produce more power, using less fuel, spray form to produce more power, using less fuel, than conventional than conventional engines.engines.

SIGNIFICANCE

Contribution to spacecraft propulsion knowledge:Contribution to spacecraft propulsion knowledge: Provide a relationship between different types of injector element Provide a relationship between different types of injector element and rocket performanceand rocket performance Smaller injector element is possibleSmaller injector element is possible

Contribution to Malaysia: Contribution to Malaysia: Realization of Malaysian made rocket propulsion systemRealization of Malaysian made rocket propulsion system Provide design, fabrication and testing procedures for rocket fuel Provide design, fabrication and testing procedures for rocket fuel injectorinjector

RECOGNITION RECEIVED

A technical paper related to the technology titled “A technical paper related to the technology titled “Spray Characteristics Spray Characteristics of Jet-swirl Nozzles for Thrust Chamber Injector” has been accepted of Jet-swirl Nozzles for Thrust Chamber Injector” has been accepted for publication in International Journal of Aerospace Science and for publication in International Journal of Aerospace Science and Technology.Technology.

Conventional fuel injectorsConventional fuel injectors

Innovative fuel injectorsInnovative fuel injectors

Design Fabricate Cold flow test Integration Static firing test

Rocket Injector Development Sequences at UiTM, Shah Alam

"Besides focusing on strategic fields such as biotechnology and information and communications technology, aerospace exploration is also being looked at and developed," Deputy Prime Minister Datuk

Seri Mohd Najib Tun Abdul Razak, “Moving Towards Space Edge”. New Straits Times