After much confusion, I finally found a paper which clarifies the spiral used in the ASWT.
Spiral Wind Machine turban blades, (SWT or ASWT), are based upon either the golden logarithmic spiral (~ Fibonacci spiral) (log SWT), or the Archimedean spiral (ASWT).
Reference: https://www.cell.com/heliyon/pdf/S2405-8440(23)04244-5.pdf
Quote from this reference:
"... The main findings from the presented examination proposed that the seashell-shaped wind turbine with the Archimedean spiral profile achieves better performance than the logarithmic profile..."
"7. Also, the Archimedean spiral seashell turbine of θ = 60◦ has the best operating range of all other configurations of the turbine."
The OLD conventional Archimedes wind turbine had multiple turns (AFAIK), and as per item 8 of the paper: " Additionally, the seashell-shaped wind turbine of the Archimedean spiral profile has a better performance than the conventional Archimedean turbine studied previously."
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