Name: Lakshmi Narayana Y.

Designation: Design Engineer

Qualification: M.Tech

M.Tech. Project (2003):





Compressor unit, located in the fore front forms one of the vital systems of an aero-engine. It generally consists of two stages: (1) Low Pressure Compressor (LPC) Unit and (2) High Pressure Compressor (HPC) Unit each independently consisting of several stages. The first stage of LPC is called fan assembly which consists of a set of blades mounted on a disc. On the front side, the disc carries a bullet-nose. Being situated in the fore-front, the fan assembly is occasionally prone to bird hit. This renders the design of it more challenging as the assembly is required to contain the damage and revive its performance after the impact.


The design and development process of fan assembly consists of two phases:    

(1)   Aerodynamic design and (2) Mechanical design.


1.     Aerodynamic Design: Based on the aerodynamic performance requirements the principal disc dimensions namely bore, rim diameters and axial widths are computed.


3.    Mechanical Design: The parameters considered in the mechanical design consist of:     (a) the number of blades and their weight, (b) the blade root geometry, (c) the rotor speed and (d) the operating temperature.


The design analysis and validation of compressor disc includes: stress calculations, vibration studies, heat transfer analysis, optimization and lifing. Over-speed analysis, burst speed estimations also forms part of design validation.


The objective of the present work is to carry out stress and vibration characteristics of a fan disc considering the mechanical and thermal loads. The mechanical load consists of two parts:


1. Centrifugal force due to rotor speed, and

2. Blade centrifugal forces.


The stress and vibration analysis are carried out using Finite Element Method. The front-end commercial software ANSYS (Ver: 5.4) [7] is adopted in this study. The working stresses as well as stress distributions are checked for safety on the basis of static failure considerations using Von Mises stress theory. The vibration analysis includes the evaluation of natural frequencies and mode shapes.


Some important results of the research investigations:






1.  M.Tech. (Machine design) from

     University, Visveswaraiah Technological University, Belgaum.590008


2. B.E. (Mechanical) from

    NMAMIT, Nitte, Mangalore University, Mangalore 575003


Contact Details:


Y.Lakshmi Narayana, #2988/16, 13th A Main, RPC Layout,

Vijay Nagar, Bangalore 560 040, India



Phone : 080-23391336(R)

Mobile: 9448151694



|Appointment | Research Interests | Publications | Positions Held | Academic Experience | Students | Citations | Courses |