In this paper, we seek to understand the influence of TPS standard nozzle shape on jet noise and improve accuracy flow pressure ratio aeronautical simulation. Through structural design an equal-diameter a nozzle, concentric dichotomy monitoring point arrangement scheme is proposed for its field sound field, free used realize k − ε. The model solved by hydrodynamics analyze characteristics turbu...

Recent progress in understanding the balance–imbalance problem is highlighted, with emphasis on spontaneous-imbalance phenomena associated with the exponentially fast “wave capture” of inertia–gravity waves. These phenomena are excluded from shallow-water models and are outside the scope of the classical Lighthill theory. Also discussed is progress on a different topic, an effort to extend the ...

This paper has focused on the formulation of the biological fish propulsion mechanism given by Sir J. Lighthill mathematical slender body theory for a bio-inspired robotic fish. A 2-joint, 3-link multibody vehicle model biologically inspired by a body caudal fin (BCF) carangiform fish propulsion is designed. The objective is to investigate and show that a machine mimicking real fish behavior ca...

No AccessTechnical NotesLighthill Stress Flux Model for Ffowcs Williams–Hawkings Integrals in Frequency DomainZhiteng Zhou, Hongping Wang, Shizhao Wang and Guowei HeZhiteng ZhouState Key Laboratory of Nonlinear Mechanics, Chinese Academy Sciences, 100190 Beijing, People’s Republic China*Ph.D. Candidate, Institute Mechanics; also School Engineering University 100049 China.Search more papers by t...

Dense human flow has been a concern for the safety of public events for a long time. Macroscopic pedestrian models, which are mainly based on fluid dynamics, are often used to simulate huge crowds due to their low computational costs (COLOMBO and ROSINI, 2005). Similar approaches are used in the field of traffic simulations (LIGHTHILL and WHITHAM, 1955). A combined macroscopic simulation of veh...