Minimization of Loss in Small Scale Axial Air Turbine Using CFD Modelling and Evolutionary Algorithm Optimization

Ali Bahr Ennil, Raya Al-Dadah, Saad Mahmoud, Kiyarash Rahbar, Ayad Al Jubori

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
712 Downloads (Pure)


Small scale axial air driven turbine (less than 10kW) is the crucial component in distributed power generation cycles and in compressed air energy storage systems driven by renewable energies. Efficient small axial turbine design requires precise loss estimation and geometry optimization of turbine blade profile for maximum performance. Loss predictions are vital for improving turbine efficiency. Published loss prediction correlations were developed based on large scale turbines; therefore, this work aims to develop a new approach for losses prediction in a small scale axial air turbine using computational fluid dynamics (CFD) simulations. For loss minimization, aerodynamics of turbine blade shape was optimized based on fully automated CFD simulation coupled with Multi-objective Genetic Algorithm (MOGA) technique. Compare to other conventional loss models, results showed that the Kacker & Okapuu model predicted the closest values to the CFD simulation results thus it can be used in the preliminary design phase of small axial turbine which can be further optimised through CFD modelling. The combined CFD with MOGA optimization for minimum loss showed that the turbine efficiency can be increased by 12.48% compare to the baseline design.
Original languageEnglish
Pages (from-to)841-8
JournalApplied Thermal Engineering
Early online date23 Mar 2016
Publication statusPublished - Jun 2016


  • Small scale axial turbine
  • CFD
  • Total loss
  • Genetic algorithm

ASJC Scopus subject areas

  • General Energy
  • General Engineering


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