Effect of Coanda nozzle clearance on the flow characteristics of air amplifier

Lee, J.M.; Cho, M.Y.; Hong, Chungpyo; Yoon, Sang-Youl; Kim, H.S.; Kim, Y.-J.

doi:10.1049/cp.2014.1207

Cited by 1 publication

(1 citation statement)

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“…In terms of an analysis of their performance, several works that address the impact of the main geometrical parameters on the performance of air amplifiers can be found in the literature, most of them from a numerical approach. There is a consensus that the most critical parameters are the width of the injection gap, δ, and the total pressure of the injected air [1,11,[13][14][15]18,[20][21][22]. The higher the injected air pressure, the higher the primary and secondary flow rates.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Characterization of a Coanda-Type Industrial Air Amplifier

Chávez-Módena,

Martinez-Cava,

Marín-Coca

et al. 2024

Applied Sciences

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The performance of an industrial air amplifier is assessed through experimental and numerical characterization, with a focus on examining the influence of various operating conditions (isolated, “blowing,” and “suction” modes) and direct geometric scaling of the device within the specified range of the injection gap (δ) and the inlet pressure characteristic values. The findings underscore the presence of a linear trend of the entrained mass flow and a nonlinear decay of the amplification factor, both with notable sensitivity to the gap width. Numerical RANS simulations validate the experimental data, characterize the asymmetric flow downstream from the device, and facilitate the exploration of more complex scenarios. In this regard, scaling the device’s dimensions reveals an optimal aspect ratio between the minimum diameter (Dm) and δ to maximize the entrained mass flow. This research provides valuable insights into the behavior of air amplifiers, offering guidance for their design and application across various industrial contexts.

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