Overclock.net › Forums › Cooling › Cooling Experiments › :::fan mod::: lowering the to\llerance
New Posts  All Forums:Forum Nav:

:::fan mod::: lowering the to\llerance

post #1 of 10
Thread Starter 
yeah for some reason my thread subject got all screwed up but anyway...

lowering the tolerance between the fan and its housing to reduce back flow = less noise due to decreasing the turbulence. this in theory would also help to increase the max pressure that the fan could make. i want to do the mod on my Big Typhoon but i haven't found the right material to do it. so far ive thought about using tape and epoxy which would need to be sanded and take lots of labor... has anyone tried this or have any ideas on how to do this?
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
post #2 of 10
[fixed]
Monster Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 P5K Deluxe 3870 2X1GB Geil 800 MHz 
Hard DriveOptical DriveOSMonitor
4 x 250 barracuda's 2 x DVD Writers Windows 7 22" Acer LCD 
KeyboardPowerCaseMouse
Razor 600W GameXStream TT Armor Modded Razor 
  hide details  
Reply
Monster Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 P5K Deluxe 3870 2X1GB Geil 800 MHz 
Hard DriveOptical DriveOSMonitor
4 x 250 barracuda's 2 x DVD Writers Windows 7 22" Acer LCD 
KeyboardPowerCaseMouse
Razor 600W GameXStream TT Armor Modded Razor 
  hide details  
Reply
post #3 of 10
???
    
CPUGraphicsRAMHard Drive
Core i5 M 520 NVS 3100M G.SKILL 8GB (2 x 4GB) 204-Pin DDR3 SO-DIMM DDR3... OCZ Vertex 3 128GB 
  hide details  
Reply
    
CPUGraphicsRAMHard Drive
Core i5 M 520 NVS 3100M G.SKILL 8GB (2 x 4GB) 204-Pin DDR3 SO-DIMM DDR3... OCZ Vertex 3 128GB 
  hide details  
Reply
post #4 of 10
Thread Starter 
yeah sorry about that i fixed it now...
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
post #5 of 10
So... you're trying to reduce fan noise? Fan silencers would be the first step.
    
CPUMotherboardGraphicsRAM
Q8400 DFI LP DK P45-T2RS eVGA GTX 650 Kingston 
Hard DriveOptical DriveOSMonitor
2.8TB Total LG Super DVD Burner SATA VII Enterprise x64 Gateway FHD2401 
PowerCaseMouseMouse Pad
Corsair VX550W NZXT Source 210 White Logitech G400 Razer Kabuto 
Audio
Creative Audigy 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q8400 DFI LP DK P45-T2RS eVGA GTX 650 Kingston 
Hard DriveOptical DriveOSMonitor
2.8TB Total LG Super DVD Burner SATA VII Enterprise x64 Gateway FHD2401 
PowerCaseMouseMouse Pad
Corsair VX550W NZXT Source 210 White Logitech G400 Razer Kabuto 
Audio
Creative Audigy 
  hide details  
Reply
post #6 of 10
Thread Starter 
ok one of the problems ive found with heat sinks and the noise coming from them is back flow due to a pressure build up between the fan and heat sink when using a high RPM/flow fan. the effect is similar to cross flow effect found on airplanes. adding wiglets to the end of the wings creates a barrier which helps to prevent a circular/spiraling flow off the back of the wing know as "cross flow" as shown in the picture. by lowering the tolerance the decreased space would in theory reduce a back flow pattern lowering noise, increasing flow as well as the max pressure the fan can produce

dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
post #7 of 10
Quote:
Originally Posted by hks85 View Post
ok one of the problems ive found with heat sinks and the noise coming from them is back flow due to a pressure build up between the fan and heat sink when using a high RPM/flow fan. the effect is similar to cross flow effect found on airplanes. adding wiglets to the end of the wings creates a barrier which helps to prevent a circular/spiraling flow off the back of the wing know as "cross flow" as shown in the picture. by lowering the tolerance the decreased space would in theory reduce a back flow pattern lowering noise, increasing flow as well as the max pressure the fan can produce
What component do you plan to mod exactly? The fan blades?

What angle and size do you plan to use? How will you ensure blade balancing? How will you be modelling the cross flow?
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
  hide details  
Reply
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
  hide details  
Reply
post #8 of 10
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
What component do you plan to mod exactly? The fan blades?

What angle and size do you plan to use? How will you ensure blade balancing? How will you be modelling the cross flow?
im not changing the fan blades because as you stated, balancing would be very difficult. instead, I want to build up the shroud that encases the fan. its a stationary object that requires no balancing. as long as the blades move freely i should have nothing to worry about. even higher quality fans like the vantec tornado have about 3mm of space in the corners. What do you mean by "modeling the cross flow"?
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
post #9 of 10
Quote:
Originally Posted by hks85 View Post
im not changing the fan blades because as you stated, balancing would be very difficult. instead, I want to build up the shroud that encases the fan. its a stationary object that requires no balancing. as long as the blades move freely i should have nothing to worry about. even higher quality fans like the vantec tornado have about 3mm of space in the corners. What do you mean by "modeling the cross flow"?
what do you mean by "build up"? Basically make a duct?
mitx
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 3570K 4.5ghz ASRock Z77E-ITX Sapphire R9 290x Tri-X 1200/1500 Crucial Ballistix Tactical LP 2x8 GB 8-8-8-24-1T 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Pro 256gb Western Digital Velociraptor Western Digital WD15EARX Western Digital WD15EADS 
CoolingOSMonitorKeyboard
Silverstone NT06-Pro Windows 10 x64 LG 29UM67 Logitech G710+ 
PowerCaseMouseAudio
Silverstone SG08 600W PSU Silverstone SG08B Logitech G700 Pioneer SE-A1000 
  hide details  
Reply
mitx
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 3570K 4.5ghz ASRock Z77E-ITX Sapphire R9 290x Tri-X 1200/1500 Crucial Ballistix Tactical LP 2x8 GB 8-8-8-24-1T 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Pro 256gb Western Digital Velociraptor Western Digital WD15EARX Western Digital WD15EADS 
CoolingOSMonitorKeyboard
Silverstone NT06-Pro Windows 10 x64 LG 29UM67 Logitech G710+ 
PowerCaseMouseAudio
Silverstone SG08 600W PSU Silverstone SG08B Logitech G700 Pioneer SE-A1000 
  hide details  
Reply
post #10 of 10
Thread Starter 
there is a space between the outer most part of the fins and the wall around it.
In this image of a car radiator, you can see what looks like 3/4" or so spacing between the end of the blades and the shroud.


as a test I electrical tape on the inside of that wall on my 80mm tornado. it wasn't too hard to do and i was able to get it down to about .5mm without any scraping of the blades against the tape. as for the noise, i wont know until i try this on my 120mm thats on the BT.
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
dBag
(9 items)
 
yep...
(10 items)
 
air
(8 items)
 
CPUMotherboardRAMHard Drive
xeon e3-1230v2 supermicro mbd x9scm-0 KVR1333D3E9S/4G OCZ vertex3 60GB 
CoolingOSPowerCase
1u 80mm blower + passive cpu  proxmox 3.1 supermicro 300w 1u supermicro 1u 
Other
2x intel pro1000 nics  
CPUMotherboardGraphicsRAM
A8-3870K @ 3.7GHz GIGABYTE A75M-UD2H Power Cooler 7870 Team Group Inc 
Hard DriveCoolingOSPower
3x OCZ Agility 3 60GB (RAID-0 on Rocket RAID 27... Corsair H-80 core win-7 Seagate 750 Gold 
CaseAudio
some lian-li case... M-Audio AV40s + 10" Sony ___? 
CPUMotherboardGraphicsRAM
D525 @ 1.8GHz Supermicro onboard 2x2GB DDR1333 
Hard DriveOSCaseOther
WD Green ubuntu 12 1u  3x40mm fans  
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Cooling Experiments
Overclock.net › Forums › Cooling › Cooling Experiments › :::fan mod::: lowering the to\llerance