A tip-covered vortex generator concept to enhance film cooling on plain and curved surfaces

Traditional film cooling with cylindrical-hole faces two challenges: (1) coolant is mainly concentrated downstream of the cooling hole center, and (2) coolant is easily lifting-off the wall at high blowing ratio conditions. Although the installation of vortex generator (VG) helps to enhance the cool...

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Published inJournal of mechanical science and technology Vol. 36; no. 4; pp. 2107 - 2126
Main Authors Hussain, Sadam, He, Kun, Yan, Xin
Format Journal Article
LanguageEnglish
Published Seoul Korean Society of Mechanical Engineers 01.04.2022
Springer Nature B.V
대한기계학회
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Abstract Traditional film cooling with cylindrical-hole faces two challenges: (1) coolant is mainly concentrated downstream of the cooling hole center, and (2) coolant is easily lifting-off the wall at high blowing ratio conditions. Although the installation of vortex generator (VG) helps to enhance the coolant coverage, it still encounters with the limited cooling effect improvement. To solve these difficulties, this paper presents a new VG design, named tip-covered VG (TCVG), to enhance the film cooling effectiveness on the plain and curved surfaces. To demonstrate the feasibility of this design, numerical simulations are performed between the traditional film cooling with cylindrical-hole (just-hole case), film cooling with traditional VGs (TVG case), and film cooling with tip-covered VG (TCVG case). The results show that, with the TCVG, the film cooling effectiveness can be improved by 25 % and 9 % as compared with the just-hole case and TVG case, respectively.
AbstractList Traditional film cooling with cylindrical-hole faces two challenges: (1) coolant is mainly concentrated downstream of the cooling hole center, and (2) coolant is easily lifting-off the wall at high blowing ratio conditions. Although the installation of vortex generator (VG) helps to enhance the coolant coverage, it still encounters with the limited cooling effect improvement. To solve these difficulties, this paper presents a new VG design, named tip-covered VG (TCVG), to enhance the film cooling effectiveness on the plain and curved surfaces. To demonstrate the feasibility of this design, numerical simulations are performed between the traditional film cooling with cylindrical-hole (just-hole case), film cooling with traditional VGs (TVG case), and film cooling with tip-covered VG (TCVG case). The results show that, with the TCVG, the film cooling effectiveness can be improved by 25 % and 9 % as compared with the just-hole case and TVG case, respectively.
Traditional film cooling with cylindrical-hole faces two challenges: (1) coolant is mainly concentrated downstream of the cooling hole center, and (2) coolant is easily lifting-off the wall at high blowing ratio conditions. Although the installation of vortex generator (VG) helps to enhance the coolant coverage, it still encounters with the limited cooling effect improvement. To solve these difficulties, this paper presents a new VG design, named tip-covered VG (TCVG), to enhance the film cooling effectiveness on the plain and curved surfaces. To demonstrate the feasibility of this design, numerical simulations are performed between the traditional film cooling with cylindrical-hole (just-hole case), film cooling with traditional VGs (TVG case), and film cooling with tip-covered VG (TCVG case). The results show that, with the TCVG, the film cooling effectiveness can be improved by 25 % and 9 % as compared with the just-hole case and TVG case, respectively. KCI Citation Count: 0
Author Yan, Xin
He, Kun
Hussain, Sadam
Author_xml – sequence: 1
  givenname: Sadam
  surname: Hussain
  fullname: Hussain, Sadam
  organization: Institute of Turbomachinery, Xi’an Jiaotong University
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  givenname: Kun
  surname: He
  fullname: He, Kun
  organization: MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an Jiaotong University
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  givenname: Xin
  surname: Yan
  fullname: Yan, Xin
  email: xinyan@mail.xjtu.edu.cn
  organization: Institute of Turbomachinery, Xi’an Jiaotong University
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Issue 4
Keywords Vortex generator
Curved surface
Film cooling
Tip-covered
Plain surface
Language English
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SubjectTerms Control
Coolants
Cooling curves
Cooling effects
Dynamical Systems
Engineering
Film cooling
Industrial and Production Engineering
Mechanical Engineering
Original Article
Vibration
Vortex generators
기계공학
Title A tip-covered vortex generator concept to enhance film cooling on plain and curved surfaces
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