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Simple method for thick blade calculation. Part 2. Application to a thin blade; Kanbenna ichiatsuyoku keisanho (zokuho). Usui tsubasa eno tekiyo

Abstract

A source and QCM (SQCM) method has been developed, by which the blade performance can be calculated in a short time with satisfying the Kutta`s condition without repeating calculations even for the three-dimensional blade. Performances were calculated for the two-dimensional and three-dimensional blades. The SQCM has provided appropriate results. However, it was found that there are some problems for thin blades. In this study, the SQCM has been applied to a thin blade. The conventional eddy model equation of SQCM is not a continuous distribution in the strict sense. In this study, this problem has been modified. When point eddies with constant strength are in line continuously within the interval, the induced velocity at an arbitrary position can be expressed by the integral equation using a position of marginal point of the interval. This equation can be analyzed by the integral of influence coefficient. The position of marginal point of the interval is a position of control point determined by the QCM theory. As a result of the modification, it was found that the SQCM in response to a thin blade has provided precise calculation results stably even for an ultra thin blade with the blade thickness ratio of 0.001.  More>>
Authors:
Maita, S; Ando, J; Nakatake, K [1] 
  1. Kyushu University, Fukuoka (Japan). Faculty of Engineering
Publication Date:
Apr 10, 1996
Product Type:
Conference
Report Number:
CONF-9605248-
Reference Number:
SCA: 420204; 420400; 990200; PA: NEDO-96:913872; EDB-97:015803; SN: 97001718558
Resource Relation:
Conference: 92. Meeting of West Japan Society of Naval Architects, Seibu zosenkai dai 92 kai reikai, Yamaguchi (Japan), 9-10 May 1996; Other Information: PBD: 10 Apr 1996; Related Information: Is Part Of 92nd Meeting of West Japan Society of Naval Architects. Summary of papers; PB: 180 p.; Seibu zosenkai dai 92 kai reikai. Ronbun kogai
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; AIRFOILS; THIN FILMS; TWO-DIMENSIONAL CALCULATIONS; THREE-DIMENSIONAL CALCULATIONS; VORTEX FLOW; MATHEMATICAL LOGIC; FLOW MODELS; RUNGE-KUTTA METHOD; AERODYNAMICS
OSTI ID:
414175
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97721550; TRN: 96:913872
Availability:
Available from West Japan Society of Naval Architects, 10-1, Hakozaki 6-chome, Higashi-ku, Fukuoka, Fukuoka Prefecture, Japan; OSTI as DE97721550
Submitting Site:
NEDO
Size:
pp. 19-23
Announcement Date:

Citation Formats

Maita, S, Ando, J, and Nakatake, K. Simple method for thick blade calculation. Part 2. Application to a thin blade; Kanbenna ichiatsuyoku keisanho (zokuho). Usui tsubasa eno tekiyo. Japan: N. p., 1996. Web.
Maita, S, Ando, J, & Nakatake, K. Simple method for thick blade calculation. Part 2. Application to a thin blade; Kanbenna ichiatsuyoku keisanho (zokuho). Usui tsubasa eno tekiyo. Japan.
Maita, S, Ando, J, and Nakatake, K. 1996. "Simple method for thick blade calculation. Part 2. Application to a thin blade; Kanbenna ichiatsuyoku keisanho (zokuho). Usui tsubasa eno tekiyo." Japan.
@misc{etde_414175,
title = {Simple method for thick blade calculation. Part 2. Application to a thin blade; Kanbenna ichiatsuyoku keisanho (zokuho). Usui tsubasa eno tekiyo}
author = {Maita, S, Ando, J, and Nakatake, K}
abstractNote = {A source and QCM (SQCM) method has been developed, by which the blade performance can be calculated in a short time with satisfying the Kutta`s condition without repeating calculations even for the three-dimensional blade. Performances were calculated for the two-dimensional and three-dimensional blades. The SQCM has provided appropriate results. However, it was found that there are some problems for thin blades. In this study, the SQCM has been applied to a thin blade. The conventional eddy model equation of SQCM is not a continuous distribution in the strict sense. In this study, this problem has been modified. When point eddies with constant strength are in line continuously within the interval, the induced velocity at an arbitrary position can be expressed by the integral equation using a position of marginal point of the interval. This equation can be analyzed by the integral of influence coefficient. The position of marginal point of the interval is a position of control point determined by the QCM theory. As a result of the modification, it was found that the SQCM in response to a thin blade has provided precise calculation results stably even for an ultra thin blade with the blade thickness ratio of 0.001. 1 ref., 8 figs.}
place = {Japan}
year = {1996}
month = {Apr}
}