scholarly journals Tunable flow asymmetry and flow rectification with bio-inspired soft leaflets

2020 ◽  
Vol 5 (8) ◽  
Author(s):  
M. Brandenbourger ◽  
A. Dangremont ◽  
R. Sprik ◽  
C. Coulais
Keyword(s):  
Angiology ◽  
1992 ◽  
Vol 43 (2) ◽  
pp. 100-109 ◽  
Author(s):  
Ross L. Levine ◽  
Jack M. Rozental ◽  
Robert J. Nickles

Author(s):  
A. Maslov ◽  
B. Zanin ◽  
A. Sidorenko ◽  
V. Fomichev ◽  
A. Pavlov ◽  
...  

2015 ◽  
Vol 8 (4) ◽  
pp. 1837-1855 ◽  
Author(s):  
Kan Zha ◽  
Stephen Busch ◽  
Paul C. Miles ◽  
Sameera Wijeyakulasuriya ◽  
Saurav Mitra ◽  
...  

Author(s):  
Xinqian Zheng ◽  
Yun Lin ◽  
Weilin Zhuge ◽  
Yangjun Zhang ◽  
Hideaki Tamaki ◽  
...  

The asymmetric flow field induced by the volute has considerable influence on the performance of a turbocharger centrifugal compressor, especially through its effect on the stability. In this paper, a novel asymmetric vaneless diffuser treatment with a circumferentially non-axisymmetric diffuser width distribution was firstly developed to enhance the stability of a centrifugal compressor for turbocharger. Design principle of the asymmetric diffuser was proposed based on the asymmetric flow in the compressor. The objective of the asymmetric vaneless diffuser design is to alleviate the flow asymmetry in the diffuser, which requires that the phase of the maximal diffuser width is coincident with the phase of the minimum static pressure in the diffuser. The results of the numerical simulation showed that the designed asymmetric diffuser was able to decrease the magnitude of the pressure distortion induced by the volute and therefore alleviated the negative effect of the volute on compressor stability. Experimental results showed that the designed asymmetric diffuser extended the stable flow range by 28.3% at designed speed compared to the prototype with symmetric diffuser.


1980 ◽  
Vol 5 (3) ◽  
pp. 165-170 ◽  
Author(s):  
C.A. POSTEMA ◽  
P.L. M. HUYGEN ◽  
R. G. M. LECLUSE ◽  
R. Th. R. WENTGES

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1618 ◽  
Author(s):  
Carla Faraci ◽  
Pietro Scandura ◽  
Carmelo Petrotta ◽  
Enrico Foti

In this paper, the findings of an experimental analysis aimed at investigating the flow generated by waves propagating over a fixed rippled bed within a wave flume are reported. The bottom of the wave flume was constituted by horizontal part followed by a 1:10 sloping beach. Bedforms were generated in a previous campaign performed with loose sand, and then hardened by means of thin layers of concrete. The flow was acquired through a Vectrino Profiler along two different ripples, one located in the horizontal part of the bed and the second over the sloping beach. It was observed that, on the horizontal bed, near the bottom, ripple lee side triggered the appearance of an onshore directed steady streaming, whereas ripple stoss side gave rise to an offshore directed steady streaming. On the sloping bed, a strong return current appears at all positions, interacting with the rippled bottom. The turbulence is non-negligible within the investigated water depth, particularly when velocities were onshore directed, due to flow asymmetry. Turbulence caused a considerable flow stirring which, above a non-cohesive bed, could lift the sediment up in the water column and give rise to a strong sediment transport.


2019 ◽  
Vol 8 (5) ◽  
pp. 3764-3771 ◽  
Author(s):  
Pedro Henrique Resende Vaz de Melo ◽  
Johne Jesus Mol Peixoto ◽  
Gustavo Santos Galante ◽  
Bruna Helena Malovini Loiola ◽  
Carlos Antônio da Silva ◽  
...  

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