DEVISED APPLICATION OF LABVIEW FOR AN AUTOMATIC TEST SYSTEM BASED ON GENERATION, CONTROL AND PROCESSING OF PULSATILE PIPE FLOWS

Bu makale, zaman ortalamalı Reynolds sayısı 1019±35≤Reta≤4817±164, salınım Reynolds sayısı, 107±4≤Reos≤4261±145, hız genlik oranı, 0.05±0.0017≤A1≤0.96±0.03 ve Womersley sayısı, 2.72±0.00≤  ≤32.21±0.00 deney aralıklarında, LabView 2009SP1®yazılım programında geliştirilmiş bir program kullanarak, sinüsel darbeli boru akışının otomatikleştirilmiş üretimi, kontrolü, veri toplama ve işlenmesini sunmaktadır. Burada ki amaç, içerisinde darbeli boru akışı analizleri için geliştirilmiş yöntem bilimini barındıran Time Dependent Flow Control.vi (TDFC.vi) ismi ile oluşturulan programı tanıtmaktır. Geliştirilen program hem eğitim hem de belirli araştırma çalışmaları için önemli katkılar sağlamaktadır. Program ayrıca mühendislik iş yükünü minimum seviyeye indirmek ve sistemin verimliliğini ve doğruluğunu artırmak için tasarlanmıştır. Geliştirilen program zamana bağımsız ve bağımlı akım dinamikleri ile ilgili gelecekteki deneysel çalışmalar için yol göstermektedir. Deneysel sonuçlar gerçek verilerin toplanmasında mükemmel doğruluklarla sistemin işlevselliğini göstermek için verilmiştir. Sonuç olarak, LabView 2009SP1® (TDFC.vi) de oluşturulan program, darbeli boru akışlarında, özelliklede türbülansa geçiş rejiminde, geleneksel analiz etme yöntemleri ile kıyaslandığında, muhtemel insan hatasını ortadan kaldırarak daha hassas ve elverişli hız ve sürtünme alanı analizleri sağlamaktadır.

DARBELİ BORU AKIŞLARININ ÜRETİMİ, KONTROLÜ VE İŞLENMESİNE DAYALI OTOMATİK BİR TEST SİSTEMİ İÇİN LABVIEW PROGRAMINDA GELİŞTİRİLEN BİR UYGULAMA

This paper presents an automated generation, control, data acquisition and processing of sinusoidal pulsatile pipe flow using a devised program in LabView 2009SP1® in the experimental ranges of the time-averaged Reynolds number, Reta of 1019±35≤Reta≤4817±164, the oscillating Reynolds number, Reos of 107±4≤Reos≤4261±145, the velocity amplitude ratio, A1 of 0.05±0.0017≤A1≤0.96±0.03 and the Womersley number,  of 2.72±0.00≤  ≤32.21±0.00. The aim herein is to introduce the devised program named as Time Dependent Flow Control.vi (TDFC.vi) within the methodology developed for pulsatile pipe flow analyses. The program provides a considerable contributions for both education and specific research studies. It has also been designed to minimize workload of an engineer and to improve the efficiency and accuracy of the system. The proposed program leads further experimental studies related on steady and time dependent flow dynamics. The experimental results are given to show the functionality of the system for the real-world data acquisition with great accuracy. As a result, the devised program in LabView 2009SP1® (TDFC.vi) provides more accurate and feasible velocity and frictional field analyses in pulsatile pipe flows when compared with the conventional analyzing methods, especially in transition to turbulent regime, with an acceptable error margin eliminating any possible human error

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