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## Details

Genre/Form: | Electronic resource |
---|---|

Material Type: | Document, Internet resource |

Document Type: | Internet Resource, Computer File |

All Authors / Contributors: |
A S Ginevsky; A I Zhelannikov |

ISBN: | 9783642017605 3642017606 |

OCLC Number: | 436431709 |

Description: | 1 online resource (xi, 148, 6 pages) : illustrations. |

Contents: | Cover -- Contents -- Abstract -- Foreword -- Introduction -- Chapter 1. General -- 1.1. Atmospheric turbulence -- 1.2. Aircraft vortex wake -- 1.3. Turbulence characteristics of the vortex wake -- 1.4. Present-day methods for numerical simulation of vortex wakes behind trunk-route aircraft -- Chapter 2. Discrete vortex method -- 2.1. Problem statement -- 2.2. Fundamentals of the discrete vortex method -- 2.3. Point vortex -- 2.4. Vortex segment -- 2.5. Closed vortex frame -- 2.6. Numerical modeling of free turbulence in separated and jet flows in the framework of the discrete vortex method -- Chapter 3. The near vortex wake behind a single aircraft -- 3.1. Aircraft geometry representation -- 3.2. Vorticity panel representation -- 3.3. Peculiarities of flow simulation around trunk-route aircraft -- 3.4. The characteristics of the near vortex wake behind some aircraft -- Chapter 4. Far vortex wake behind a turbojet aircraft -- 4.1. The algorithm for computation of the far vortex wake behind aircraft -- 4.2. Mathematical model of the far vortex wake -- 4.3. Check for the existence and uniqueness of the solution -- 4.4. Similarity considerations for flow in the far vortex wake -- 4.5. A universal procedure for transition to the mathematical model of the far vortex wake -- 4.6. Consideration of the state of the atmosphere -- 4.7. Verification of the method and predicted results -- 4.8. The characteristics of the vortex wake behind the Il-76 aircraft -- 4.9. The characteristics of the vortex wake behind the An-124, B-747 and A-380 aircraft -- Chapter 5. Vortex wakes behind propeller-driven aircraft -- 5.1. Problem statement -- 5.2. The effect of propellers on the far vortex wake characteristics -- 5.3. On a rational number of vortices for modeling a propeller -- 5.4. Examples of computed far vortex wake characteristics of propeller-driven aircraft in comparison with experimental data -- 5.5. The characteristics of the vortex wake behind the An-26 aircraft -- 5.6. The characteristics of the vortex wake behind the An-12 aircraft -- 5.7. The characteristics of the vortex wake behind the C-130 aircraft -- Chapter 6. Wind flow over rough terrain -- 6.1. Basic conditions -- 6.2. Problem statement -- 6.3. A solution technique. Terrain representation -- 6.4. Examples of air flow computations -- Chapter 7. Simulation of the far vortex wake of an aircraft at takeoff and landing -- 7.1. Problem statement -- 7.2. Simulation of an aircraft8217;s near vortex wake. Linear theory -- 7.3. An approximate computation of an aircraft8217;s far vortex wake -- 7.4. Generation of crossflow by vortex tubes. Turbulent boundary layer computation -- 7.5. Computation of the far vortex wake behind the B-727 aircraft with account for the effect of the boundary layer on an aerodrome8217;s surface. Comparison between computational results and flight test data -- 7.6. Computation of the far vortex wake of Russian8211;built Tu-204 and Il-96 trunk-route aircraft at landing -- 7.7. On the visualization of an aircraft8217;s far vortex wake near the ground -- 7.8. Conclusions and prospects -- Chapter 8. Aerodynamic loads on aircraft encountering vortex wakes of other aircraft -- 8.1. Problem statement -- 8.2. A solution technique -- 8.3. Verification of the method and predicted results -- 8.4. The aerodynamic loads on aircraft in the far vortex wakes of preceding aircraft -- 8.5. Prediction of the effect of wind flow over rough terrain on the aerodynamic loads experienced by an aircraft. |

Series Title: | Foundations of engineering mechanics. |

Responsibility: | A.S. Ginevsky, A.I. Zhelannikov. |

### Abstract:

The book presents methods of mathematical modeling of vortex wakes of aircraft in flights at high altitudes and close to the ground at take-off-landing regimes. The modeling is based on an extensive application of the method of discrete vortices in aircraft flights at high altitudes and on a conjugation of this method with the integral method of predicting the turbulent boundary layer which is produced at the secondary wall transversal flow induced by the aircraft vertex system at take-of-landing regimes. In this latter case an interaction between the vortex wake of aircraft and the secondary vortices generated at boundary layer separations is taken into account. The authors consider separately methods of modeling the near and far vortex wakes of aircrafts with turbojets and air propellers and they present the results of predicting vortex wakes of a series of domestic and foreign aircrafts. The effect of number of factors is taken into account in these cases: turbulence and atmosphere stratification, presence of side wind at take- off-landing regimes. The computer time consumption while modeling the vortex wakes according to the proposed method is 3 - 4 orders less than in the case of using the well-known numerical methods. The non-linear non-stationary mathematical model of light aircraft movement when they enter the vortex wake of a heavy aircraft with a description of possible catastrophic consequences for the light aircraft is considered separately. A comparison between the prediction data and the experimental results is given. The book is intended for researchers and engineers, as well as for lecturers, post-graduate and undergraduate students.

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