Critical impact velocity for ice fragmentation

被引：17

作者：

Guegan, Pierrick ^{[1
]}

Othman, Ramzi ^{[1
]}

Lebreton, Daniel ^{[1
]}

Pasco, Franck ^{[1
]}

Villedieu, Philippe

Meyssonnier, Jacques ^{[2
]}

Wintenberger, Sylvie

机构：

[1] Ecole Cent Nantes, Inst Rech Genie Civil & Mecan, F-44321 Nantes, France

[2] CNRS, LGGE, UMR 5183, F-75700 Paris, France

来源：

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE | 2012年 / 226卷 / C7期

关键词：

Hailstorm; aircraft engines; ice fragmentation; critical velocity; restitution coefficient; RESTITUTION COEFFICIENTS; INGESTION; STRENGTH;

D O I：

10.1177/0954406211426639

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The fragmentation process is a main concern in many engineering applications such as preventing flameouts of aircraft engines. The authors of this article are interested in measuring the critical impact velocity for ice fragmentation. Precisely, a dropweight technique was applied to study the ice ball impacts on glass plates. The influence of ice ball temperature, diameter and impact angle is also investigated. The after-impact ice ball state was found to be classified into two cases: an altered state and a non-altered state. The critical impact velocity is defined as the minimum impact velocity for which the ice ball is altered after impact or the maximum impact velocity for which the ice ball is not altered after impact. The experimental results are analysed by a model, assuming that the alteration regime is observed as soon as the ice ball normal kinetic energy is higher than a critical value of its deformation energy. This model depends on one parameter which is determined in this study. This last result is the major achievement of this article as there is almost no measurement of this parameter in the literature.

引用

页码：1677 / 1682

页数：6

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