What type of burner uses high velocity air for atomization?

A rotary cup burner utilizes high-velocity air for the purpose of atomization. This type of burner is designed to create a fine mist of fuel, which enhances combustion efficiency. The mechanism involves rotating a cup, which dispenses the liquid fuel while high-velocity air streams across it. This results in the fuel being atomized into small droplets that mix easily with air for a more complete burn.

In contrast, conical burners and flat flame burners function through different methodologies that may not rely on high-velocity air for atomization. Conical burners tend to create a divergent airflow pattern to control the flame shape and stability, while flat flame burners have a broader, flatter flame and typically use a simple distribution method for fuel without the focus on high-velocity air. Pressure jet burners, although capable of creating a fine fuel spray, do so using pressure rather than high-velocity air for atomization. Therefore, the rotary cup burner stands out as the correct answer in the context of high-velocity air atomization.