منابع مشابه
Non-linear Identification Applied to Broadband Turbomachinery Noise
Coherence based source analysis techniques can be used to identify the contribution of broadband noise sources in the exhaust of a gas turbine and hence enable the design of noise reduction devices. However, when the broadband noise source propagates in a non-linear fashion the identified contribution using ordinary coherence methods will be inaccurate. In this paper, an analysis technique to e...
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Noise generated by turbulent boundary layers near the trailing edge of lifting surfaces continues to pose a challenge for many applications. Much of the previous work on this topic has focused on development of accurate computational methods for the prediction of trailing edge noise. For instance, aeroacoustic calculations of the flow over an airfoil using large-eddy simulation (LES) and aeroac...
متن کاملBluff Body Noise Reduction Using Aerodynamic Interference
Abstract This paper will discuss a method of bluff body noise control that utilises the phenomenon of aerodynamic interference. This technique uses a second body (not necessarily bluff) that is placed in the wake of the bluff body whose noise we wish to control. Through proper understanding of the wake dynamics, the amplitude and phase of the noise from the downstream body can be controlled so ...
متن کاملThe Aerodynamic Noise of a Slot in an Aerofoil
SUMMARY This Report describes a theoretical investigation of the noise generated when turbulence interacts with a slot between a wing and flap. The slot is modelled by the region between two overlapping, semi-infinite rigid planes representing the wing and flap, and sound is produced when turbulence convects above, below or through the slot. The analysis determines the dependence of the radiate...
متن کاملMultidisciplinary Optimization in Turbomachinery Design
This paper investigates particular aspects of performing multidisciplinary optimizations in different turbomachinery design steps. The differences in the optimization approaches and used methods in preliminary and final design steps are shown. An optimization environment is developed, which supports multidisciplinary turbomachinery design. The general concept and components are explained. Some ...
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ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
سال: 1995
ISSN: 0387-5016,1884-8346
DOI: 10.1299/kikaib.61.3804