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science and research supports many ideas for better cooling !
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Posted by neil dale [Email] (#2111) [Profile/Gallery] (more from neil dale) on Thu, 8 Jun 2017 21:15:13 Share Post by Email
In Reply to: Re: You Dog! and ideas for better cooling whilst on the subject, Justin VanAbrahams [Profile/Gallery] , Thu, 8 Jun 2017 15:59:11
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re rear radiator rear placement: Actually there HUGE theoretical,practical and actual advantages in air flow , cooling and ample research to document it EG we did this on motorcycles w/ oil coolers for the same reason mounting a small Lockhart style oil cooler in the rear beside the rear wheel in a low pressure area using it as an auxiliary water radiator and realised a 20 F degree decrease in water temperature ! the brilliant late NZ engineer John Britten had rear mounted radiators on his V1000 cycles too more than 25 + years ago . The std front radiator placement suffers greatly from restricted airflow at most speeds showing optimum cooling air flow only in a very restricted narrow speed range. The aerodynamic science is there w/ research to back it up. So why do you disbelieve and disagree? Many race vehicles that do not have to cave to the convention and conform have radiators mounted other locations than the front for packaging and performance enhancement. Underhood Thermal Simulation of a Small Passenger Vehicle with Rear Engine Compartment to Evaluate and Enhance Radiator Performance
2010-04-12 A DFSS Approach to Design Cooling System of Small Passenger Car Having Rear Engine and FrontMounted Radiator
2016-04-05
Technical Paper
2016-01-0657
T Sethuramalingam, Chandrakant Parmar, Sashikant Tiwari
This paper presents the implementation of DFSS method to design a distinctive cooling system where the engine is mounted in the rear and radiator is mounted in the front of the car. In automobile design, a rear-engine design layout places the engine at the rear of the vehicle. ...This paper is about designing a distinctive cooling system of a car having rear mounted engine and front mounted radiator. This kind of arrangement requires lengthy coolant lines extended between the radiator and the engine throughout the length of the car, routed beneath the car. ...The external bypass close to coolant pump offers a much lower resistance flow path as compared to the long radiator cooling lines increasing the risk of less coolant flows through the radiator
Technical Paper
2010-01-0801
Vivek Kumar, Sachin A. Shendge, S. Baskar
The airflow management issues become even more severe in case the underhood environment is located at the rear end of the vehicle, away from the ram air zone available in front of the vehicle, as is the case in the present study. ...In the present study, engine cooling performance is studied by evaluating radiator heat dissipation and Top Hose Temperatures (THT) using 1D (KULI) and 3D (FLUENT, RADTHERM) simulation codes. ...These design changes resulted in improved heat dissipation performance of the radiator and better airflow and thermal management of the underhood. Simulation results at steady state operating conditions are compared with vehicle test results and a good agreement observed.
Development of a Rear Powertrain Cooling System for a Minivan
2016-04-05
Technical Paper
2016-01-0654
Lakshmaiah Brahmasani, Sarangapani K, Samson Solomon, Parvej Khan
Furthermore, in the conventional rear cooling system, in front of the radiator, there is engine and exhaust system, which heats up the air going to the radiator and reduces radiator cooling performance. ...The air flow, ROA of Coolant and ROA of Oil are measured for two conditions, i.e. radiator facing towards rear bumper and radiator facing towards powertrain. It is observed that the effect of the rear vortex has a negligible impact on the airflow provided by the fan, for vehicle speed less than 65kmph. ...The packaging of the cooling system is finalized such that the radiator faces towards the rear of the vehicle bumper which is opposite to the conventional rear cooling system (i.e. radiator faces towards the front of the vehicle). Experimental Analysis for the Improvement of Radiator Cooling Air Intake and Discharge
1992-02-01
Technical Paper
920787
Hiroyuki Takahashi, Shigeru Ogino, Takao Nishimura, Yoshiyuki Okuno
ABSTRACT EXPERIMENTAL ANALYSIS for the increase of the radiator cooling air has been performed with special attention to the utilization of air pressure in high-speed running conditions. ...Measurements of pressure distributions at the radiator cooling air intake showed that the prevention of the occurrence of separations around the bumper is the efficient method to increase the cooling air. ...Furthermore, the optimum configuration for the radiator cooling air discharge has also been experimentally studied using a simplified model which simulates the under part of the engine compartment.

->Posting last edited on Fri, 9 Jun 2017 18:35:06.

_______________________________________ viggen02


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