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No Banana Anymore - Highly Curved Merged Airfoils Cascades

 
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Mustafa Umut Sarac
Boomerang-Insider


Anmeldungsdatum: 19.09.2018
Beiträge: 150
Wohnort: Istanbul - Turkey

BeitragVerfasst am: 02.05.2019, 19:05    Titel: No Banana Anymore - Highly Curved Merged Airfoils Cascades Antworten mit Zitat

Tradition comes from modern minimalist science which tries to minimize the effort of building expenses. But science finds too many complex geometries increases costs but increases the efficiency.

I thought extremelly complex has been equalled to production of simple single airfoil by 3d printing.

I found gas turbine impellers are very good examples of highy complex , beatiful and how low weight and extreme high load and extreme low turbulence blade production.





We can design such a complex structure consists many smaller highly curved airfoils which planned horizontally and vertically crosses, merges to each other and being printed with 3d printer.

In my view,

There will be no tradition anymore , no fear of production costs but extreme science where there is no banana shaped boomerang anymore but extremelly complex smaller merging impeller blades or so, 3d printed in one structure.

Many highly curved airfoils criss crosses , merges with each other, vertically and horizontally and all structure control air flow.

Vertical airfoils and horizontal airfoils have their logical roles.

think two or more different 3d solid above impeller drawings, models been merged and produced highly complicated shape.

I use it.

I read one blade have 200 parameters to calculate but below paper makes it hand calculator result , easy.

Mustafa Umut Sarac
Istanbul


Zuletzt bearbeitet von Mustafa Umut Sarac am 02.05.2019, 23:42, insgesamt 10-mal bearbeitet
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Mustafa Umut Sarac
Boomerang-Insider


Anmeldungsdatum: 19.09.2018
Beiträge: 150
Wohnort: Istanbul - Turkey

BeitragVerfasst am: 02.05.2019, 21:04    Titel: Antworten mit Zitat

[size=18]PAPER IS HEREBELOW , MODERN VERSION IS AT LOWEST POST.
[/size]
https://drive.google.com/file/d/18zM1JgZjVcZEa45qNFOo5IuQjDdkPx7o/view?usp=sharing

A general theory of 3 dimensional flow in subsonic and transonic turbomachines of axial , radial and mixed flow types.

Chung Hua Wu

c.h.wu 1952 naca tn 2604 booklet.


most basic turbomachinery flow design paper , it works with taylor expansion but if you fail to do first well , it expands bad fast.

naca paper 1952 , after 60 years , it is still a legend paper.

This paper still been referenced by nato agard publications as the easiest and hand calculator generated blades , impellers and cascades and their flow.

A long paper or a booklet with very good detailed drawings and math.


Zuletzt bearbeitet von Mustafa Umut Sarac am 03.05.2019, 10:47, insgesamt einmal bearbeitet
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Mustafa Umut Sarac
Boomerang-Insider


Anmeldungsdatum: 19.09.2018
Beiträge: 150
Wohnort: Istanbul - Turkey

BeitragVerfasst am: 03.05.2019, 07:51    Titel: Antworten mit Zitat



Boomerang would be like Gaudi door handle.

Mustafa Umut Sarac
Istanbul
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Mustafa Umut Sarac
Boomerang-Insider


Anmeldungsdatum: 19.09.2018
Beiträge: 150
Wohnort: Istanbul - Turkey

BeitragVerfasst am: 03.05.2019, 10:34    Titel: Antworten mit Zitat

Zhao Xiao-lu
Research Associate.
SunChun-lin
Research Associate.
Wu Chung-Hua
Professor and Director.
Institute of Engineering Thermophysics,
Chinese Academy of Sciences,
Beijing, People's Republic of China

1982


A Simple Method for Solving
Three-Dimensional Inverse
Problems of Turbomachine Flow
and the Annular Constraint


Condition
In 1950, Wu [1] suggested that the three-dimensional inverse (design) problem of turbomachine flow may be solved approximately by a Taylor series expansion in the circumferential direction based on the known flow variation over an S2 stream surface in the midchannel of the blade passage. This idea has been realized recently.
A new coordinate transformation has been developed. The coordinate surfaces are coincident with the S2 stream surfaces. This transformation leads to a new method to calculate the aerodynamic equations of three-dimensional flow. By the use of this transformation, a high-order expansion is realized to determine the shape of the blade surf aces from the fluid state on the S2m stream surface directly. Computation in this manner soon leads to the discovery that theoretically the distribution of flow parameter (usually Ver) on S2m prescribed by the designer should satisfy a constraint condition, which guarantees that the Sj stream surfaces along the hub and
shroud obtained from circumferential extension of the S2m surface are surfaces of revolution. An approximate method is suggested to meet this condition



PAPER IS HEREBELOW :

https://drive.google.com/file/d/1SkC8WwHF8xAJzivNkLmWU4Gik42Ln_vk/view?usp=sharing
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Mustafa Umut Sarac
Boomerang-Insider


Anmeldungsdatum: 19.09.2018
Beiträge: 150
Wohnort: Istanbul - Turkey

BeitragVerfasst am: 03.05.2019, 13:53    Titel: Antworten mit Zitat



simpler idea but explainotary.
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Mustafa Umut Sarac
Boomerang-Insider


Anmeldungsdatum: 19.09.2018
Beiträge: 150
Wohnort: Istanbul - Turkey

BeitragVerfasst am: 03.05.2019, 16:35    Titel: Antworten mit Zitat



fluid flow cells used at paragliders also.



seagull struts are not linear , they direct fluid flow to with less turbulence.

flow cells and nonlinear struts can be matched to understand main reasoning.

Gaudi made above handle with pressing his hand in to clay. I dont know how to optimize such a shape flow cells and stators but I am open to hear from you.
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