Currently the field of micro-turbine is an active research area; the bladeless Tesla turbine because of its simplicity and robustness of structure, low cost and comparatively better operation at high rpm may become a suitable candidate for this application. For this to happen the efficiency of the Tesla turbine, however, has to be improved. Researchers are attempting to achieve this by modification of the configuration of the conventional Tesla turbines (see, for example, Guha and Smiley3).