scholarly journals Novel Method for Evaluating Intake Unsteady Flow Distortion

2021 ◽  
pp. 1-13
Author(s):  
Matteo Migliorini ◽  
Pavlos K. Zachos ◽  
David G. MacManus
Keyword(s):  
Unsteady Flow ◽  
Flow Distortion ◽  
Novel Method

scholarly journals Assessment methods for unsteady flow distortion in aero-engine intakes

2018 ◽  
Vol 72 ◽  
pp. 292-304 ◽  
Author(s):  
Daniel Gil-Prieto ◽  
David G. MacManus ◽  
Pavlos K. Zachos ◽  
Abian Bautista
Keyword(s):  
Unsteady Flow ◽  
Assessment Methods ◽  
Flow Distortion ◽  
Aero Engine

Unsteady Flow Distortion Past Blades: Sources of Noise Generation in Rotating Flows

1992 ◽  
Author(s):  
D. O. Rockwell ◽  
O. Akin ◽  
J. H. Kim ◽  
S. Konak ◽  
J. Kuryla ◽  
...  
Keyword(s):  
Unsteady Flow ◽  
Rotating Flows ◽  
Noise Generation ◽  
Flow Distortion

Use of Pipeline Wave Propagation Model for Measuring Unsteady Flow Rate

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Nigel Johnston ◽  
Min Pan ◽  
Sylwester Kudzma ◽  
Pengfei Wang
Keyword(s):  
Wave Propagation ◽  
Unsteady Flow ◽  
Flow Rate ◽  
Propagation Model ◽  
Rate Measurement ◽  
Pressure Data ◽  
Flow Rate Measurement ◽  
High Bandwidth ◽  
Novel Method ◽  
Wave Propagation Model

A novel method for estimation of unsteady flow rate using pressure at two or three points along a pipeline is described in this paper. The pressure data are processed using a wave propagation model to determine the unsteady flow. The comparison and analysis of two-transducer and three-transducer techniques are investigated through simulation. The proposed method is shown to be effective for unsteady flow rate measurement over a high bandwidth. However, if the pressure values from two transducers are used, inaccuracies exist at certain frequencies when the transducer spacing coincides with multiples of half a wavelength. The accuracy can be improved by adding a third transducer with unequal spacing. The three-transducer method has been implemented in experiments and has been found to be robust and reliable.

scholarly journals A novel method for unsteady flow field segmentation based on stochastic similarity of direction

AIP Advances ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 045020 ◽  
Author(s):  
Noriyasu Omata ◽  
Susumu Shirayama
Keyword(s):  
Flow Field ◽  
Unsteady Flow ◽  
Novel Method

QUACC, a novel method for predicting unsteady flows — including propellers and store release

2001 ◽  
Vol 105 (1050) ◽  
pp. 427-434
Author(s):  
D. L. Hunt ◽  
M. Childs ◽  
M. Maina
Keyword(s):  
Analytic Function ◽  
Unsteady Flow ◽  
Unsteady Flows ◽  
Accurate Solution ◽  
Test Case ◽  
Moving Surface ◽  
Flow Equations ◽  
Novel Method ◽  
The Cost

AbstractAerospace designers are increasingly interested in predicting unsteady flowfields such as those associated with store release, rotating propellers etc. However, the cost of performing fully unsteady calculations is usually prohibitively expensive. In order to address this problem for unsteady flows driven by a moving surface, a novel method is presented which calculates the time derivates as an analytic function of the instantaneous flowfield. This allows an accurate solution of the unsteady flow equations to be calculated using a quasi-unsteady approach. The validity of this approach is demonstrated for a store release and a propeller test case. Possible extensions to this method for more complex unsteady flows are presented.

The removal and morphology of intact biofilms from implanted venous access devices

1995 ◽  
Vol 53 ◽  
pp. 1020-1021
Author(s):  
M.A. Gregory ◽  
G.P. Hadley
Keyword(s):  
Patient Selection ◽  
Surgical Oncology ◽  
Venous Access ◽  
Common Procedure ◽  
Indwelling Catheters ◽  
Careful Patient ◽  
Novel Method ◽  
The Subject ◽  
Vascular Catheters ◽  
Venous Access Devices

The insertion of implanted venous access systems for children undergoing prolonged courses of chemotherapy has become a common procedure in pediatric surgical oncology. While not permanently implanted, the devices are expected to remain functional until cure of the primary disease is assured. Despite careful patient selection and standardised insertion and access techniques, some devices fail. The most commonly encountered problems are colonisation of the device with bacteria and catheter occlusion. Both of these difficulties relate to the development of a biofilm within the port and catheter. The morphology and evolution of biofilms in indwelling vascular catheters is the subject of ongoing investigation. To date, however, such investigations have been confined to the examination of fragments of biofilm scraped or sonicated from sections of catheter. This report describes a novel method for the extraction of intact biofilms from indwelling catheters.15 children with Wilm’s tumour and who had received venous implants were studied. Catheters were removed because of infection (n=6) or electively at the end of chemotherapy.

Sign in / Sign up

Export Citation Format

Share Document