Further Experiments and Investigations for Discharge Coefficient of PTC 6 Flow Nozzle in a Wide Range of Reynolds Number

Author:

Furuichi Noriyuki1,Terao Yoshiya1,Nakao Shinichi2,Fujita Keiji3,Shibuya Kazuo3

Affiliation:

1. National Institute of Advanced Industrial Science and Technology, National Metrology Institute of Japan, Tsukuba-Central 3, 1-1-1 Umezono, Tsukuba 305-3563, Japan e-mail:

2. Flow Measurement Consulting Laboratory Flow Col, Youkoudai 4-27-7, Isogo-ku, Yokohama 235-0045, Japan e-mail:

3. Flow Engineering Co., Ltd., Tsuruyacho 2-13-2, Kanagawa-ku, Yokohama 221-0835, Japan e-mail:

Abstract

The discharge coefficients of the flow nozzles based on ASME PTC 6 are measured in a wide range of Reynolds number from Red = 5.8 × 104 to Red = 1.4 × 107, and the equations of the discharge coefficients are developed for the laminar, the transitional, and the turbulent flow ranges. The equation of the discharge coefficient consists of a nominal discharge coefficient and the tap effect. The nominal discharge coefficient is the discharge coefficient without tap, which is experimentally determined from the discharge coefficients measured for different tap diameters. The tap effects are correctly obtained by subtracting the nominal discharge coefficient from the discharge coefficient measured. The deviation of the present experimental results from the equations developed is from −0.06% to 0.04% for 3.0 × 106 < Red < 1.4 × 107 and from −0.11% to 0.16% for overall Reynolds number range examined. The developed equations are expected to be capable of estimating the discharge coefficient of the throat tap nozzle defined in PTC 6 with a high accuracy and contribute for the high accurate evaluation of steam turbines in power plants.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Reference21 articles.

1. Analytic Determination of the Discharge Coefficients of Flow Nozzles,1955

2. Application of Boundary Layer Theory to Explain Some Nozzle and Venturi Flow Peculiarities;Trans. IME,1959

3. Flow Nozzles With Zero Beta Ratio;ASME J. Basic Eng.,1964

4. Friction Coefficient in the Inlet Length of Smooth Round Tubes,1948

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3