Means and arrangement for fuel icing protection
a technology heat dissipation device, which is applied in the direction of water supply installation, lighting and heating apparatus, turbine/propulsion fuel heating, etc., can solve the problems of fuel system failure, water freezing, and engine oil heat may not be sufficient to eliminate the threat of fuel icing, so as to improve the effect of fuel icing protection
Inactive Publication Date: 2016-06-23
ROLLS ROYCE PLC
View PDF9 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The patent aims to prevent fuel from getting too hot and clogging engine parts. This is done by controlling the potential heating within the fuel system.
Problems solved by technology
When engines are required to operate in low ambient temperatures, in particular temperatures below 0° C., there is a risk that this water will freeze.
These ice particles can lead to failure of the fuel system, for example by blocking units in the fuel flow passages or causing malfunction of fine clearance valves by adhering to the surfaces of these valves in the fuel system.
However, at certain engine operation conditions, the heat from engine oil may not be sufficient to eliminate the fuel icing threat.
Utilising an external heat source to heat the fuel leads to increased weight / cost / complexity in the fuel system, which is undesirable.
In addition, there are risks of fuel overheating in the failure scenario when the fuel can come into direct contact with the heating source.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031]This present disclosure controls the potential heating within a fuel system. Hence an example of a conventional fuel system and its operation will be first described to provide a clear understanding of the modifications made by the disclosure.
[0032]A typical fuel system 2 is illustrated in FIG. 1. It consists of a low pressure (LP) pump 4 for pumping fuel from an aircraft tank 6, which represents the upstream end of the system, to a moderate pressure. A fuel and oil heat exchanger (FOHE) 8 is provided downstream of the LP pump 4 to enable heat transfer to the fuel from engine oil. A filter 10 is provided downstream of the FOHE 8 to maintain fuel cleanness. Bypass valves 12 are provided for both the FOHE 8 and the filter 10 to provide a flow path for fuel in the event that one or other of these becomes blocked during operation.
[0033]Downstream of the filter 10, a high pressure (HP) pump 14 is provided to further raise the fuel pressure to a sufficiently high level that the fuel...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A fuel delivery system comprises a pump, a fuel metering device located downstream of the pump, and a fuel spill loop from the fuel metering device to a discharge point at a location upstream of the pump.The fuel metering device regulates the fuel flow to a combustor and directs surplus fuel delivered by the pump through the fuel spill loop. The system further includes a means for controlling one or more of the pressure and volume of the fuel flow delivered to the fuel metering device independently of the engine operating conditions to thereby control the temperature of the fuel.
Description
[0001]This disclosure claims the benefit of UK Patent Application No. GB142258.8, filed on 18 Dec. 2014, which is hereby incorporated herein in its entirety.FIELD OF THE DISCLOSURE[0002]The present disclosure relates to temperature control of aircraft fuel. In particular, the disclosure relates to a new arrangement and method for improving fuel icing protection.BACKGROUND OF THE DISCLOSURE[0003]The fuel flow from an aircraft fuel tank to gas turbine engines can contain water. When engines are required to operate in low ambient temperatures, in particular temperatures below 0° C., there is a risk that this water will freeze. In such circumstances, the ice will normally be present to the engine as dispersed ice particles in suspension. These ice particles can lead to failure of the fuel system, for example by blocking units in the fuel flow passages or causing malfunction of fine clearance valves by adhering to the surfaces of these valves in the fuel system.[0004]The problem is typic...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): F23R3/28
CPCF23R3/28F02C7/224F05D2270/303F05D2270/301
Inventor WANG, YIREID, MARK P.JONES, DAVID I.
Owner ROLLS ROYCE PLC