@ARTICLE{Piechna_Janusz_R._Numerical_2006,
 author={Piechna, Janusz R.},
 volume={vol. 53},
 number={No 1},
 journal={Archive of Mechanical Engineering},
 pages={49-71},
 howpublished={online},
 year={2006},
 publisher={Polish Academy of Sciences, Committee on Machine Building},
 abstract={Many groups of researchers have focused on the design of micro turbine engines in recent years. Since turbo-component efficiency becomes very low due to the downsizing effect, an important problem arises of how to obtain thermal efficiency high enough to produce the positive power required. The micro wave rotor is expected to be applied for the improvement of the performance of ultra micro gas turbines, increasing the cycle pressure ratio. Wave rotors can also be built in another configuration. Applying only a combustion chamber and using oblique blades to form the rotor cells, net power can be taken from the rotor. In that way, the use in a micro scale of an inefficient turbo unit can be omitted. Such a solution in a form of wave engine was developed and practically realised by Weber [ 15] and Pearson [8], [9], [ IO] in centimetre scale. Conventional construction of wave engines in a form of wave rotor can not be directly realized in MEMS technology. The new idea of a wave disk developed by Piechna, Akbari, Iancu,and Mueller [II] and independently by Nagashima and Okamoto [7] gives the possibility of easy implementation of the wave engine idea in MEMS technology. In the proposed solution, the wave disk plays the role of an active compressiondecompression unit and torque generator. Appropriate port geometry with oblique blades forming the disk channels generates torque. The engine disk rotates with a speed much lower than the conventional turbo-unit that simplifies the bearing problem. Also, the construction of electric generator can be simpler. The paper presents the proposed flow schemes, thermodynamic cycle, exemplary engine construction and some results of simulation of the MEMS wave engine using the wave disk.},
 type={Article},
 title={Numerical study of the wave disk micro-engine operation},
 URL={http://journals.pan.pl/Content/124955/PDF/5_MECHANICAL_53_2006_1_Piechna_numerical.pdf},
 keywords={unsteady flows, MEMS wave engine},
}