List of Articles Propeller

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  1 - Qualification of Propeller by Experimental and Analytical Methods
  K. Siva Prasad S. Murthy Bellala
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• Open Access Article
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  2 - A Simple Method for Designing a Duct for a Multi-Component Ducted Propulsion System
  N. M. Nouri Mehrdad Kalantar Neyestanaki Saber Mohammadi
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  3 - A Quasi-Analytical Method Algorithm Development in Redesigning the Geometry and Structural Analysis of An Aircraft Propeller and Comparing with the Finite Element Method
  Behrooz Shahriari Hassan Izanlo Nedasadat  Seddighi
  The aircraft propeller is effective in the performance of the aircraft propulsion system and must have acceptable structural strength. The complex aerodynamic geometry of the propeller makes its analysis more difficult. In this study, dynamic and aerodynamic stresses ar More

  The aircraft propeller is effective in the performance of the aircraft propulsion system and must have acceptable structural strength. The complex aerodynamic geometry of the propeller makes its analysis more difficult. In this study, dynamic and aerodynamic stresses are calculated using the Finite Element Method (FEM). A structural analysis algorithm based on the quasi-analytical method is developed to evaluate the finite element analysis. In this regard, first, an algorithm is developed to redesign the propeller which performs in a way that by checking the dimensions, the geometry of the quasi-propeller is determined with the same mass and the coordinates of the center of mass. Then, different algorithms are developed to calculate the distribution of mass, moment of inertia, and the cross-section of the quasi-blade geometry. The calculation algorithms of rotational dynamic and aerodynamic stress distribution are developed. The results show that the FEM and the quasi-analytical method are well matched. In this study, the force equivalent to the thrust and the opposite force to the propeller rotation are placed instead of the aerodynamic pressure distribution. The comparison of the results obtained from the quasi-analytical method and the FEM indicates that the overall maximum stress of the system occurs at the root of the propeller and the maximum net stress due to aerodynamic forces occurs in the middle of the propeller geometry. According to the results, the rotational dynamic stress is much higher than the aerodynamic stress. It is also shown that the aerodynamic stress reduces the overall stress of the system. Manuscript profile
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  4 - The study of the vibration of the floating structure due to the excitation of the propeller using numerical analysis of fluid-structure (FSI)
  Mahdiesadat Azizai Yousef Amirian Abdolhossein Fereidoon
  Vibration of floating structures under the effect of propeller excitation is One of the main issues in the design of floating structures and not paying attention to this issue and the placement Super structure at the bottom of the float, vibrations caused by the stimulu More

  Vibration of floating structures under the effect of propeller excitation is One of the main issues in the design of floating structures and not paying attention to this issue and the placement Super structure at the bottom of the float, vibrations caused by the stimulus of the fan can cause problems for crews and individuals and the vibrations from the propeller make noise and also reduce the life of existing machines in the bottom of the float. In this paper the vibrations caused by the propeller stimulation, using a numerical analysis of fluid-structure on a commercial vessel is studied and the results are discussed. First with respect to the geometry and condition a suitable propeller was chosen for the float and the numerical solution for different speeds of the float and the angular velocity of the impeller is done. The floating structure is designed based on the standard and discretization is conducted using finite element.  Pressure distribution on the propeller and hull obtained from the numerical solution of fluid flow, has been applied to floating structures in the structural analysis and floating structures due to harmonic loading induced by the rotation of the propeller is investigated and modal analysis of floating structures has been performed And the results of its analysis in a frequency range including natural frequencies that canaries in different modes and rotational speeds  of the propeller were recorded. The Results show that in some rotational speeds of the propeller excitation frequency in rotational speed can lead to vibration increase and resonance amplitude The results are compared with the standard range, the results show that with accurate choosing of the propeller And the range of allowable angular velocity and optimization of the structure, we can provide the Requirements for vibration exposure in the limited range. Manuscript profile
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  5 - Numerical solution of hovering propeller performance at various blade pitch angles and revolutions with different turbulence models
  Behrooz Shahriari Mohammad Reza Hashemi
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