Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature

YAO, S. C.; SOZBIR, NEDIM; GÜVEN, HASAN RIZA; Yigit, Cemil; ISSA, Roy J.

Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature

Cemil YİĞİT, (Sakarya Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü, Sakarya, Türkiye)

Nedim SÖZBİR, (Sakarya Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü, Sakarya, Türkiye)

S. C. YAO, (Department, of Mechanical Engineering, Carnegie Mellon Univercity Pittsburgh, Pennsylvania,15213,USA)

Hasan Rıza GÜVEN, (İstanbul Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü, İstanbul, Türkiye)

Roy J. ISSA (Department, of Engineering and Computer Science, West Texas A M Univercity TX 79016 Canyon, USA)

Isı Bilimi ve Tekniği Dergisi

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Yıl: 2011 Cilt: 31 Sayı: 1 Sayfa Aralığı: 27 - 36 Metin Dili: Türkçe İndeks Tarihi: 29-07-2022

Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature

Öz:

Çekirdek kaynama rejiminden film kaynama rejimine kadar ısıtılmış metal yüzeylere çarpan su sisinin ısı transferi mekanizmasını ortaya çıkarmak için deneysel ve sayısal çalışmalar yürütüldü. Deneysel koşulların simülasyonunu yapmak için bir sayısal model geliştirildi. Deneysel çalışmada su damlacıklarını taşıyan havanın hızı 0-50 m/s, sıvı kütle akısı 0-7.67 kg/$m^ 2$s ve paslanmaz çelik yüzeyin sıcaklığı 500-525$^ o C$ aralığında değişmektedir. Çeşitli hava hızları ve sıvı kütle akıları için lokal ısı transfer katsayısı ve radyal ısı transfer dağılımı ölçüldü. Deneysel ve sayısal çalışmalar göstermiştir ki, durgunluk noktasındaki ısı transfer katsayısı sadece hava hızıyla değil sıvı kütle akısıyla da artmaktadır. Buna ilaveten, hava jeti içerisine küçük miktarda su eklendiğinde ısı transfer katsayısı dikkate değer bir biçimde artmaktadır. Sıvı spreyinde ısı transfer katsayısı sıvı kütle akısıyla birlikte yaklaşık lineer olarak artmaktadır. Sayısal çalışmanın sonuçları deneysel verilerle karşılaştırıldı ve sayısal model deneysel verilerle iyi bir uyum göstermektedir.

Anahtar Kelime:

Konular: Termodinamik

Leidenfrost sıcaklığındaki bir çelik plakanın sprey ile soğutulmasının deneysel ölçümü ve sayısal modellenmesi

Öz:

Experimental studies and numerical simulations were conducted to reveal the heat transfer mechanism of impacting water mist on metal surfaces heated temperatures ranging from nucleate to film boiling regime. The test conditions of water mist cover the variations of air velocity from 0 to 50 m/sec, liquid mass flux from 0 to 7.67 kg/$m^ 2$sec, and surface temperature of stainless steel between 525$^ o C$and 500$^ o C$. Local heat transfer coefficient and radial heat transfer distributions were measured at different air velocities and liquid mass fluxes. Experimental studies and computer simulations show that heat transfer coefficient increases not only with the air velocity but also with the liquid mass flux at the stagnation point. In addition, a small amount of water added in the impacting air jet, the heat transfer is significantly increased. For dilute spray, the mist heat transfer coefficient increases almost linear with the water mass flux. Results of computational study were compared against experimental data at atmospheric conditions, and the numerical model showed good accordance with the test data.

Anahtar Kelime:

Konular: Termodinamik

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	Yigit C, SOZBIR N, YAO S, GÜVEN H, ISSA R (2011). Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. , 27 - 36.
Chicago	Yigit Cemil,SOZBIR NEDIM,YAO S. C.,GÜVEN HASAN RIZA,ISSA Roy J. Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. (2011): 27 - 36.
MLA	Yigit Cemil,SOZBIR NEDIM,YAO S. C.,GÜVEN HASAN RIZA,ISSA Roy J. Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. , 2011, ss.27 - 36.
AMA	Yigit C,SOZBIR N,YAO S,GÜVEN H,ISSA R Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. . 2011; 27 - 36.
Vancouver	Yigit C,SOZBIR N,YAO S,GÜVEN H,ISSA R Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. . 2011; 27 - 36.
IEEE	Yigit C,SOZBIR N,YAO S,GÜVEN H,ISSA R "Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature." , ss.27 - 36, 2011.
ISNAD	Yigit, Cemil vd. "Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature". (2011), 27-36.

APA	Yigit C, SOZBIR N, YAO S, GÜVEN H, ISSA R (2011). Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. Isı Bilimi ve Tekniği Dergisi, 31(1), 27 - 36.
Chicago	Yigit Cemil,SOZBIR NEDIM,YAO S. C.,GÜVEN HASAN RIZA,ISSA Roy J. Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. Isı Bilimi ve Tekniği Dergisi 31, no.1 (2011): 27 - 36.
MLA	Yigit Cemil,SOZBIR NEDIM,YAO S. C.,GÜVEN HASAN RIZA,ISSA Roy J. Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. Isı Bilimi ve Tekniği Dergisi, vol.31, no.1, 2011, ss.27 - 36.
AMA	Yigit C,SOZBIR N,YAO S,GÜVEN H,ISSA R Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. Isı Bilimi ve Tekniği Dergisi. 2011; 31(1): 27 - 36.
Vancouver	Yigit C,SOZBIR N,YAO S,GÜVEN H,ISSA R Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature. Isı Bilimi ve Tekniği Dergisi. 2011; 31(1): 27 - 36.
IEEE	Yigit C,SOZBIR N,YAO S,GÜVEN H,ISSA R "Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature." Isı Bilimi ve Tekniği Dergisi, 31, ss.27 - 36, 2011.
ISNAD	Yigit, Cemil vd. "Experimental measurements and computational modeling for the spray cooling of a steel plate near the leidenfrost temperature". Isı Bilimi ve Tekniği Dergisi 31/1 (2011), 27-36.