Abstract: A double annular combustor for a gas turbine engine is provided with annular arrays of main and pilot fuel injection modules. The main fuel injection modules are of the premix type so as to vaporise fuel. However, the pilot fuel injection modules are configured so as to function as both premix and airspray fuel injectors. During starting and low power conditions, the pilot fuel injectors are operational alone in their airspray mode. However during high power conditions, both the main and pilot fuel injection modules function as premix injectors. The arrangement reduces noxious emissions.

Abstract: A multi-stream fuel injector for a gas turbine engine comprises a plurality of concentric member which define a plurality of flow passages carrying HP compressor air or fuel/air mixture. One of the members is formed with a wide-angle, frusto-conical flared lip to propagate a wide-angle fuel/air mixture cone in the combustion region. The lip is of such a cross-sectional configuration that air flowing over the lip surface remains attached to the surface and flows in a non-turbulent manner, initially in a radially inward direction, and subsequently in a radially outward direction. The lip ensures that undesirable regions of recirculation are avoided around the fuel injector.

Abstract: A fuel injection apparatus which is suitable for use with the combustion apparatus of a gas turbine engine, is adapted to produce reduced amounts of noxious emissions. The apparatus comprises a central core which is provided with two fuel supply ducts. The first fuel supply duct supplies fuel for atomization in a swirling airstream; the atomized fuel being subsequently thoroughly mixed with air in an axially elongate mixing duct. The second fuel supply duct supplies fuel to the downstream end of the core where the fuel is atomized by an air flow through a duct surrounding the core before being exhausted from the core downstream end.

Abstract: A process for the preparation of bacon having improved taste and aesthetic appearance which is suitable for heating in a microwave comprising the steps of:providing slices of uncooked bacon;placing said slices of uncooked bacon between a pair of screen members;conveying said uncooked bacon between said screen members into a bath of hot cooking oil and/or bacon grease;maintaining said bacon in said bath for a period of time sufficient to cook said bacon to the desired degree of crispness;conveying the cooked bacon from said bath, and;removing said bacon from between said screen members.

Abstract: A gas turbine engine fuel injection apparatus comprises a fuel spray atomizer which directs a fuel spray onto the radially inner surface of an annular flow deflector. The fuel flows in a film over the flow deflector surface towards an annular lip at the downstream end of the deflector. Swirling air flows are directed over the radially inner and outer surfaces of the flow deflector so as to atomize the fuel as it leaves the annular lip. The fuel is evaporated in the swirling airflows and thoroughtly mixed with the airflows in a mixing duct before being discharged into a combustion chamber. The thorough mixing of the evaporated fuel and the airflows prior to combustion results in the production of reduced quantities of the oxide of nitrogen.

Abstract: A gas turbine engine annular combustor having a bulkhead at its upstream end which is thermally protected by an annular array of heat shields. Each heat shield is provided with integral flanges which space apart the heat shields and bulkhead to define chambers therebetween. Apertures in the bulkhead direct cooling air into the chambers. Further apertures in the heat shields exhaust the cooling air in a common circumferential direction so that the air flows merge to define a substantially continuous annular flow of cooling air about the longitudinal axis of the combustor and across the downstream heat shield faces.

Abstract: A gas turbine engine annular combustor (16) has a bulkhead (19) at its upstream end which is protected by an annular array of heatshields (32). Each of the heatshields (32) is spaced apart from the bulkhead (19) by flanges (37, 38,39,40) on the upstream heatshield face. Cooling air entry apertures (47) provided in the bulkhead (19) direct cooling air into the space (36) between the bulkhead (19) and each heatshield (32). The flanges (37,38,39,40) direct the cooling air so that some flows towards a fuel burner aperture (35) in the center of each heatshield (32) while the remainder flows towards the heatshield (32) edges.

Abstract: A gas turbine engine annular combustor having a bulkhead at its upstream which is thermally protected by an annular array of heat shields. Each heat shield is provided with integral flanges which space apart the heat shields and bulkhead to define chambers therebetween. Apertures in the bulkhead direct cooling air into the chambers at positions adjacent the outer peripheries of the heat shields. The cooling air flows generally inwards within each chamber before being exhausted therefrom.

Abstract: A perforated sheet for the promotion of film cooling a gas turbine engine comprises two separate layers of laminate material which are placed in superposed abutting relationship. The first layer has a plurality of apertures of given cross-sectional area therein. The second layer also has a plurality of apertures therein which have larger cross-sectional areas than the corresponding apertures in the first layer. The apertures in the first layer are in fluid communication with the apertures in the second layer to form passageways through the perforated sheet. These passageways permit a cooling flow of fluid to pass through the perforated sheet so it can be discharged as a cooling fluid film along the inner surface of the perforated sheet. The apertures in each layer are independently formed to produce the passageways. The apertures can easily be machined to the desired size, shape, and angle to optimize the cooling film effectiveness for any particular application.

Abstract: An applicator is mounted to a transverse boom carried by a tractor and moved through a field at such a height as to directly contact target vegetation above a selected level, and avoid application of treating liquid to any shorter, desirable vegetation. The applicator includes an outlet manifold, a plurality of receivers connected to an inlet manifold, a respective plurality of generally vertically oriented, transversally spaced non-porous applicator rods each extending between the outlet manifold and a respective receiver, an elevated reservoir for treating liquid, and a pump for recirculating back to the reservoir excess treating liquid which has flowed down outsides of the rods and into the receivers without having been brushed-off onto vegetation contacted by the rods. The outlet manifold and receivers are provided with filters, and each receiver is provided with a trash shield, all for preventing clogging and for facilitating clean-out of the treating liquid flow path.

Abstract: An applicator unit is moved through a field of growing vegetation, for instance as an implement mounted across the front of a farm tractor. The unit includes a horizontal, laterally extending outlet manifold ranked above a similarly arranged inlet manifold. Between each manifold a plurality of forwardly convex knee-like rod members are mounted. In use, a treatment liquid to be directly applied to vegetation is arranged to run out of the outlet manifold in a superficial sheet along the surface of each rod. As vegetation is grazed by the rods, some of the treatment liquid is wiped onto the vegetation. Any treatment liquid which is not thus wiped onto vegetation is collected from the lower ends of the rods into the inlet manifold and pumped back up to a reservoir from which it flows to the outlet manifold. By preference each knee-like rod is disposed at an incline as seen in front elevation in order to decrease the chance that a tall thin plant can pass untreated between two adjacent rods.

Abstract: An apron chain lubricating apparatus for roll baling machines is actuated to automatically lubricate the apron chains in response to the rear frame of the machine being raised and lowered such as in discharging a bale from the machine. The apron lubricating apparatus includes a reservoir, containing lubricant, and a pump both preferably mounted on the rear frame of the machine. The pump is operated to deliver lubricant from the reservoir onto the apron chains when the rear frame is raised and lowered.

Abstract: In a crop roll forming machine of the type having a bale forming region defined by bale forming means movably mounted on a mobile frame and wrapping means to bind a formed roll of crop material with a binding material there is provided a plurality of independently operable severing means that, in synchronization, will be activated by triggering means to concurrently sever the binding material. The severing means are comprised of a plurality of cutting blades and striker plates which cooperatively interface at the conclusion of a bale wrapping cycle to sever the binding material.