Numerical Simulation of Bird Strike on Jet Engine Considering Bird Ingestion Requirements

2021 ◽  
pp. 1-13
Author(s):  
Junjie Li ◽  
Yunfeng Lou ◽  
Xianghai Chai ◽  
Zhiqiang Ma ◽  
Xianlong Jin
Keyword(s):  
Numerical Simulation ◽  
Bird Strike ◽  
Jet Engine

Numerical Simulation of Bird Strike Damage on Jet Engine Fan Blade

2004 ◽  
Author(s):  
Kazuo Shimamura ◽  
Tadashi Shibue ◽  
Donald J. Grosch
Keyword(s):  
Numerical Simulation ◽  
Impact Force ◽  
Bird Strike ◽  
Soft Body ◽  
Jet Engine ◽  
Fan Blade ◽  
The Impact ◽  
Interaction Problem ◽  
Numerical Simulation Technique ◽  
Good Agreement

Aircraft jet engine should be designed to keep the required performance against for the event of foreign object ingestion, such as bird-strike. For the purpose to realize highly efficient and more advanced design of fan blade of jet engine, a numerical simulation technique for bird-strike problem has developed. Good agreement was obtained between simulation results and the soft body impact tests described in this paper. It was also shown that bird-strike problem has to be recognized as a fluid-structure interaction problem, because the impacted bird behaves like fluid and the impact force is highly influenced by the deformation of fan blade.

scholarly journals A Brief Introduction to the Bird Strike Numerical Simulation

2016 ◽  
Vol 9 (4) ◽  
pp. 946-950 ◽  
Author(s):  
Aniello Riccio ◽  
Roberta Cristiano ◽  
Salvatore Saputo
Keyword(s):  
Numerical Simulation ◽  
Bird Strike

Dynamic Test of Bird Strike on a Flat Plate Made from LY-12 Aluminium

2013 ◽  
Vol 765-767 ◽  
pp. 3158-3161
Author(s):  
Jun Liu ◽  
Zheng Li Zhang
Keyword(s):  
Numerical Simulation ◽  
Dynamic Response ◽  
Dynamic Test ◽  
Time History ◽  
Aircraft Design ◽  
Bird Strike ◽  
Test Results ◽  
Valuable Data ◽  
Good Agreement ◽  
Peak Value

Tests of bird strike have been carried out on plate made from LY-12 Aluminium. The test was down with the projectile impacting the target perpendicularly at velocity of 40m/s, 80m/s, 120m/s respectively. The displacement-time history curves and strain-time history curves of on LY-12 Aluminium plate were measured. The good agreement of the results between two specimens in one group indicated that the results tested in the presnet paper are reliable. The dynamic response of the plate and damage modes of the bird influenced by striking velocity were analyzed. The peak value of the displacement linear enlarged with the increasing of the striking velocity. The test results in the present paper provided valuable data for aircraft design impacted by bird, and also provided abundant test datas for the numerical simulation model applied in bird striking.

scholarly journals Numerical Study on the Critical Frequency Response of Jet Engine Rotors for Blade-Off Conditions against Bird Strike

2019 ◽  
Vol 9 (24) ◽  
pp. 5568 ◽  
Author(s):  
Saeed Badshah ◽  
Ahsan Naeem ◽  
Amer Farhan Rafique ◽  
Ihsan Ul Haq ◽  
Suheel Abdullah Malik
Keyword(s):  
Modal Analysis ◽  
Dynamic Behavior ◽  
Critical Frequency ◽  
Material Model ◽  
Operating Conditions ◽  
Mode Shapes ◽  
Bird Strike ◽  
Critical Mode ◽  
Jet Engine ◽  
Engine Rotor

Vibrations are usually induced in aero engines under their normal operating conditions. Therefore, it is necessary to predict the critical frequencies of the rotating components carefully. Blade deformation of a jet engine under its normal operating conditions due to fatigue or bird strike is a realistic possibility. This puts the deformed blade as one of the major safety concerns in commercially operating civil aviation. A bird strike introduces unbalanced forces and non-linearities into the engine rotor system. Such dynamic behavior is a primary cause of catastrophic failures. The introduction of unbalanced forces due to a deformed blade, as a result of a bird strike, can change the critical frequency behavior of engine rotor systems. Therefore, it is necessary to predict their critical frequencies and dynamic behavior carefully. The simplified approach of the one-dimensional and two-dimensional elements can be used to predict critical frequencies and critical mode shapes in many cases, but the use of three-dimensional elements is the best method to achieve the goals of a modal analysis. This research explores the effect of a bird strike on the critical frequencies of an engine rotor. The changes in critical mode shapes and critical frequencies as a result of a bird strike on an engine blade are studied in this research. Commercially available analysis software ANSYS version 18.2 is used in this study. In order to account for the material nonlinearities, a Johnson Cook material model is used for the fan blades and an isotropic–elastic–plastic–hydrodynamic material model is used for modeling the bird. The bird strike event is analyzed using Eularian and smoothed particle hydrodynamics (SPH) techniques. A difference of 0.1% is noted in the results of both techniques. In the modal analysis simulation of the engine rotor before and after the bird strike event, the critical failure modes remain same. However, a change in the critical frequencies of the modes is observed. An increase in the critical frequencies and excitation RPMs (revolution per minute) of each mode are observed. As the mode order is increased, the higher the rise in critical frequency and excitation RPMs. Also, a change in the whirl direction of the different modes is noted.

Study on Micro-Turbine Engine’s Characteristics During Windmill Starting Process

2012 ◽  
Author(s):  
Xin Fu ◽  
Zhaoyun Wan ◽  
Guoping Huang ◽  
Zheng Xie
Keyword(s):  
Numerical Simulation ◽  
Ignition Time ◽  
Jet Fuel ◽  
Mechanical Loss ◽  
Jet Engine ◽  
Rotation Rates ◽  
Chamber Temperature ◽  
Mach Numbers ◽  
Micro Turbine ◽  
Starting Process

This paper examines the performance characteristics of a certain model of micro-turbine jet engine during windmill starting process, on the basis of numerical simulation and experimentation. First, the rotor’s comprehensive mechanical loss at various rotation rates below idling speed can be generated through the combination of the cold blowing experiments on turbine-less rotor system and the numerical simulation upon compressor under related in-flow Mach numbers. Given the rotor’s comprehensive mechanical loss, cold blowing experiments on the whole micro-turbine jet engine bring out the whole engine’s balance characteristics at various Mach numbers below idling speed, via the numerical simulation upon compressor and turbine. Moreover, based on numerical simulation and experimentation, the influence of propane ignition time and propane pressure upon engine rotation speed and combustion chamber temperature is studied to meet the demand of combustion in the shortest possible time, as well as confirm the minimum required propane. Further experiments show the optimal jet fuel supply time and pattern that bring the micro-turbine jet engine to idling status within the minimum time, and also reveal the minimum windmill starting time at various in-flow Mach numbers, as well as the minimum Mach number for windmill start.

Bird strike analysis of jet engine fan blade

2014 ◽  
Author(s):  
Narender Lakshman ◽  
Ratnesh Raj ◽  
Yagnavalkya Mukkamala
Keyword(s):  
Bird Strike ◽  
Jet Engine ◽  
Fan Blade

scholarly journals Verification and application of bird strike analysis for the design of high-speed helicopter composite cowlings

2021 ◽  
Vol 349 ◽  
pp. 04011
Author(s):  
Radek Doubrava ◽  
Martin Oberthor ◽  
Petr Bělský ◽  
Bohuslav Cabrnoch
Keyword(s):  
Numerical Simulation ◽  
High Speed ◽  
Direct Method ◽  
Bird Strike ◽  
Aircraft Structures ◽  
Important Phenomenon ◽  
Impact Experiment ◽  
Bird Impact ◽  
Impact Experiments ◽  
A Direct Method

Bird strikes are an important phenomenon that must be taken into consideration when designing aircraft. A bird impact experiment provides a direct method to examine the bird strike resistance. However, the design of the aircraft structures usually involves many iterations of design-manufacturing-test and conducting bird impact experiments is not only time consuming but also costly. The aim of this work is to show the application of test verified numerical simulation for the design of composite cowlings of the high-speed helicopter.

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