• Design a robust housing system that contains fuel injector, swirler, venturi.

• Design various swirlers that have different shapes and vane angles.

• Design an exit plate that is able to control the exit area of the confinement.

• Design two confinements of different material with stable mounting system.

• Tolerance need to be considered during design and manufacture process to avoid center shifting of the flame.

• Try to avoid the welding process when you need precise manufacturing.

• Improve the quartz fitting design to prevent the vibration and risk of shattering.

• Aluminum foil was used to reduce the radiation emitted from the flame.

• Fully lifted and swirled flame fits the project requirements.

The major problems of the current implemented Lean Direct Injection (LDI)) burner testing platform are high noise level, insufficient mixture of air and fuel, and the unstable burner confinement. Therefore, these become the focuses of our senior design team. A new exit area changing plate, various types of swirlers and a more robust confinement need to be designed and manufactured to solve the above problems. During the manufacturing process, lathe, milling, drilling, water jet, etc. based on computer numerical control (CNC) facilitate the high precision of different parts. Prototyping and testing process meet our expectation, while future improves remain in both design and manufacture area such as a more thorough consideration of clearance, thermal expansion, machinability of different materials, etc.

Abstract

Objectives Design - Exit Plate

Design – Venturi & Swirler

Design – Connection Bracket• An innovation method to connect housing and the

dome.

• Using only one draw latch to install compares to four draw latches from previous design.

• Firmly holds the housing and dome.

• Minimize the number of machining

processes on housing part.

Design - Confinements

Prototyping & Testing

Recommendation

Next Generation LDI Burner Testing Platform

• The weight was designed much lighter compared to previous design.• The slot design can not only ensure the translational movement, but also

save the space and weight.• A stepper motor was adopted so the exit plate is able to count the

revolution.• The code was written so the driver can read the input voltage to control

the exit area. The area was set to be maximum when the input is 5 volts, and the area becomes minimum when the input is 0 volts. These features including the speed and torque can be modified by adjusting the assembly and editing the code.

• Purpose is to swirl the air-fuel mixture and lift the flame from touching the chamber surface.

• The venturi is easier to install and dismantle directly on the housing compares to previous design.

• Snap ring design forms a space for swirler to expand while heating up.

• The venturi forms flat surface inside the flame chamber to prevent flame distortion.

• Two caps were welded to top corners of steel tube confinement to connect and support the exit plate using screws.

• Four rods with key slots were designed to fit the quartz. Rods were fixed using screws at bottom. Also, threads were tapped on top to support the exit plate.

• The 304 stainless steel shown at the left can withstand high temperature up to 1650°F.• The quartz thickness is only 1/16 in which gives better conditions for future laser testing.

Team Members: Kaidi Du, Yan Fang, Cong Mu, Jianran Wang, Bowen Wu, Liang Yuchi

Photo