115results about How to "Reduce the effect of drag" patented technology

A wing tip device for fixing to the outboard end of a wing, the wing defining a wing plane, includes: an upper wing-like element projecting upwardly with respect to the wing plane and having a trailing edge; and a lower wing-like element fixed with respect to the upper wing-like element and having a root chord and a trailing edge, the lower wing-like element root chord intersecting with the upper wing-like element, and the lower wing-like element projecting downwardly from the intersection. The upper wing-like element is larger than the lower wing-like element and the trailing edge of the lower wing-like element is adjacent the trailing edge of the upper wing-like element at the intersection. An included angle between the upper and lower wing-like elements at the intersection is less than, or equal to, 160 degrees.

This invention relates to an aft pylon fairing (30) for a suspension system of an aircraft engine, comprising two side panels (44) assembled to each other by inner cross stiffening ribs (46) spaced at intervals from each other along a longitudinal direction (X) of the fairing, and also comprising a heat protection deck (32) designed to delimit an engine core flow (36). According to the invention, it also comprises two longitudinal connecting walls (58) offsetting the deck (32) from the ribs (46), each of these two longitudinal walls (58) being provided with a first side end (62) fixed to one or the other of the two side ends (60, 60) of the deck (32), and a second side end (64) rigidly fixed to the ribs (46).

The invention relates to a compound air filter material and a method for preparing the same. The composite air filter material used for filter bags comprises a protective layer, a deodorizing layer and a filter layer, wherein the protective layer and the filter layer are compounded on two side faces of the deodorizing layer respectively; the protective layer is made of wood pulp fiber filter paper, spun-bond non-woven fabric or spun-lace non-woven fabric, and the gram weight of the material of the protective layer is 10 to 200g / m; the deodorizing layer is made of one of active carbon, zeolite , sodium bicarbonate, magnesium aluminum silicates and silica gel or a mixture of any two of the wood pulp fiber filter paper, the spun-bond non-woven fabric and the spun-lace non-woven fabric, and the gram weight of the material of the deodorizing layer is 10 to 300g / m; and the filter layer is made of melt-blown non-woven fabric, wood pulp fiber filter paper or SMS non-woven fabric, and the gram weight of the material of the filter layer is 10 to 100g / m. The compound air filter material has high filtration efficiency and deodorization efficiency, low filtration resistance and high dust capacity.

Easily implemented randomization within a flash memory EEPROM reduces the NAND string resistance effect, program disturbs, user read disturbs, and floating gate to floating gate coupling that result from repeated and long term storage of specific data patterns. The randomization may be code generated pseudo randomization or user driven randomization in different embodiments. User driven commands, the timing of which cannot be predicted may be used to trigger and achieve a high level of randomization. Randomly altering the encoding scheme of the data prevents repeated and long term storage of specific data patterns. Even if a user wishes to store the same information for long periods, or to repeatedly store it, it will be randomly encoded with different encoding schemes, and the data pattern will therefore be varied.

A plasma-induced drag reduction device is mounted on an underside of a vehicle front fascia. The drag reduction device has a dielectric substrate formed of a dielectric material, a first electrode mounted on a bottom, exposed surface of the dielectric substrate, and a second electrode mounted a top surface of the dielectric substrate and insulated by the dielectric substrate, and a power source connected to the first and second electrodes. The second electrode is disposed in a rearward direction relative to the first electrode. When activated, the device generates a plasma region that attracts an air flow passing underneath the vehicle, reducing the separation of the flow field and thereby reducing the impingement of the air flow on the ground and reducing the drag on the vehicle.

Easily implemented randomization within a flash memory EEPROM reduces the NAND string resistance effect, program disturbs, user read disturbs, and floating gate to floating gate coupling that result from repeated and long term storage of specific data patterns. The randomization may be code generated pseudo randomization or user driven randomization in different embodiments. User driven commands, the timing of which cannot be predicted may be used to trigger and achieve a high level of randomization. Randomly altering the encoding scheme of the data prevents repeated and long term storage of specific data patterns. Even if a user wishes to store the same information for long periods, or to repeatedly store it, it will be randomly encoded with different encoding schemes, and the data pattern will therefore be varied.

A mechanism for producing turbulent flow of the air moving over the rear deck of a vehicle is an air flow control apparatus comprising a vehicle spoiler of a typical and well known type having a horizontal portion joined integrally with spaced apart vertical standoffs. Mounted between the standoffs is a rotating spinner held in bearing sets. The spinner provides blades configured for rotating the spinner when the vehicle moves using its slipstream.

The invention relates to an experimental evaluation method of water trap damage of a dense oil reservoir. In order to solve the problems that by the conventional water trap damage experiment method, when a dense oil reservoir core is used as an evaluation object, liquid permeability cannot be measured and cannot be accurately measured and experimental pressure conditions cannot simulate the underground production pressure and the reservoir pore pressure and the like, the invention provides an experimental method for effectively and objectively evaluating the water trap damage of the dense oil reservoir. Through exertion of a back pressure on the outlet end of the dense core, an underground production pressure condition and a reservoir pore pressure condition are simulated and the defects that the conventional flooding cannot effectively establish the pore pressure inside the core and simulate the underground production pressure are overcome. Through exertion of the back pressure on the outlet end, the movability of a movable pore throat inside the dense core can be significantly improved, the liquid seepage capability is enhanced, the precision and accuracy for measuring the liquid flow of the dense core are improved, an evaluation result can represent the underground production state of the dense oil reservoir and can objectively evaluate the water trap damage of the dense oil reservoir. The experimental evaluation method is an experiment method applied to core analysis and reservoir protection during exploration and development of petroleum and natural gas.

The invention discloses a self-rotating and cleaning device of dirt in a heat transfer tube, comprising a spiral hairbrush arranged in the heat transfer tube of a heat exchange tube and can moves in a straight line in the tube, wherein the spiral hairbrush is arranged on a traction shaft by a connecting rope; one end of the connecting rope is connected with the spiral hairbrush; and the other end of the connecting rope passes through a pipe inlet of the heat transfer tube of the heat exchanger and is fixed on the traction shaft which is connected with a drive device through a driving mechanism. Scale attached to the wall of the heat transfer tube of the heat exchanger is removed under the action of friction and cleaning of the spiral hairbrush. In addition, when the self-rotating and cleaning device is free from cleaning, the spiral hairbrush has little influence on the fluid resistance and the flow change of the fluid can be correspondingly reduced by adopting a structure that the spiral hairbrush can be clamped on a dual-layer metal mesh away from an outlet of the heat transfer tube at a certain distance. In addition, the connecting rope is free from being stressed when not being for cleaning, so that the durability of the self-rotating and cleaning device can be greatly improved, the self-rotating and cleaning device can meet the requirement for operating for a long term and can be applied on general heat exchangers with the flow speed of the fluid being greater than 1m / s on a large scale.

A Solanum lycopersicum plant including within its genome at least one Tomato Spotted Wilt Virus (TSWV) resistance allele and at least one Phytophthora infestans resistance allele. The resistance alleles are present in the coupling phase at different loci on one chromosome and the plant is resistant against TSWV and resistant against at least Phytophthora infestans. A method for producing a hybrid Solanum lycopersicum plant including (a) obtaining a Solanum lycopersicum plant having within its genome at least one Tomato Spotted Wilt Virus (TSWV) resistance allele and at least one Phytophthora infestans resistance allele in the coupling phase; and (b) crossing the Solanum lycopersicum plant with a second Solanum lycopersicum plant bearing an additional resistance allele.

The invention provides a three-dimensional forward-looking audio-visual sonar (3DFLS) system and method. The 3DFLS system comprises a sonar cabin, an emitting linear array, a receiving array and a data processing module; the emitting array changes the vertical emitting aperture to adjust the vertical emitting wave beam width, and thus the shallow water environment is detected; the receiving arraycomprises multiple layers of receiving arc arrays, the interlayer spacing is same, a plurality of receiving elements are distributed in each layer of receiving arc array at equal intervals, and the receiving arc arrays adhere to the bottom of the sonar cabin; and the data processing module is arranged in the sonar cabin and used for processing detection data of the emitting array and the receivingarray. The method comprises the steps that the emitting array sets an emitting wave beam through the data processing module and process the emitting wave beam stably, the receiving array processes echo data, coordinates of scattering points in a three-dimensional space are calculated, and three-dimensional acoustic imaging is obtained. An emitting scheme capable of adjusting the wave beam width is adopted, different water body environments are adapted more excellently, thus the detection effect of the 3DFLS is improved, and adaptability to the environment is improved.

The invention relates to a flat-panel solar photovoltaic water-heating air-heating compound heat collector which comprises a box, evenly distributed copper tubes, an inlet tube, an outlet tube and a glass cover plate. A heat absorption plate is disposed in a cavity between the glass cover plate and the copper tubes. The copper tubes contact with the heat absorption plate. An air interlayer is formed between the glass cover plate and the heat absorption plate. Photovoltaic cells are evenly disposed on the top surface of the heat absorption plate, adjacent to the glass cover plate. The bottom surface of the heat absorption plate is evenly provided with micro flow stoppers. Two widthwise walls of the box below the bottom surface of the heat absorption plate are provided with an air inlet and an air outlet respectively. A through air channel is formed in the box below the bottom surface of the heat absorption plate. The flat-panel solar photovoltaic water-heating air-heating compound heat collector allows for frequency-by-frequency utilization of solar energy to generate electric energy and heat energy simultaneously, so that utilization rate of solar energy is increased greatly. The water-heating or air-heating modes can be selected according to season and environment requirements, yearly full utilization of light and heat is achieved, the temperature of a photovoltaic plate is lowered, and photoelectric conversion rate is increased.

An aerodynamic unit is attached onto a roof of a road vehicle so that air passes over the unit during forward movement of the road vehicle. The unit has a first end for positioning distal to a rear end of a vehicle roof and a second end for positioning proximal a rear end of a vehicle roof. The unit includes an inclined guide portion which decreases in height in a direction towards the trailing end of the unit. The unit also includes a flow director, which directs air flow to the guide portion, disposed at or near the leading end of the aerodynamic unit. The flow director has a height increasing in a direction from the leading end towards the trailing end. The unit may include vortex generators protruding from the guide portion. A fin may extend along each side of the unit in a direction between the trailing end and the leading end.

Facetted impression elements are disclosed. The impression elements can be located, for instance, on an anvil roll and may be used during an embossing or bonding process. The impression elements include at least two chamfered surfaces that at least partially surround the top surface. The chamfered surfaces are at an angle to the top surface that lower and reduce drag that may occur between the impression element and a sheet of material as the impression element enters and exits the sheet. In one embodiment, the impression element includes a first chamfered surface having an angle of from about 5° to about 40° and a second chamfered surface having an angle of from about 40° to about 70°.

A wing tip device for fixing to the outboard end of a wing, the wing defining a wing plane, includes: an upper wing-like element projecting upwardly with respect to the wing plane and having a trailing edge; and a lower wing-like element fixed with respect to the upper wing-like element and having a root chord and a trailing edge, the lower wing-like element root chord intersecting with the upper wing-like element, and the lower wing-like element projecting downwardly from the intersection. The upper wing-like element is larger than the lower wing-like element and the trailing edge of the lower wing-like element is adjacent the trailing edge of the upper wing-like element at the intersection. An included angle between the upper and lower wing-like elements at the intersection is less than, or equal to, 160 degrees.

A Lycopersicon esculentum plant comprising within its genome at least one tomato yellow leaf curl virus (TYLCV) resistance allele and at least one root knot nematode resistance allele, characterized in that the resistance alleles are present in coupling phase at different loci on one chromosome and in that the plant is highly resistant both against TYLCV and to at least one root knot nematode species selected from the group consisting of Meloidogyne arenaria, Meloidogyne incognita and Meloidogyne javanica.

The present invention provides devices and methods for reducing or eliminating sources of systematic errors in the measurement of absolute gravity or gravity field gradients; specifically, an improved test mass for an interferometer is disclosed that reduces the influence of nearby electromagnetic fields on a freefalling test mass.

An apparatus includes a group of data cells and a reference cell coupled to the group of data cells. The reference cell includes four magnetic tunnel junction (MTJ) cells. Each of the four MTJ cells is coupled to a distinct word line. Each of the four MTJ cells includes an MTJ element and a single transistor. The single transistor of each particular MTJ cell is configured to enable read access to the MTJ element of the particular MTJ cell.

A variable resonator has a dielectric substrate 2, an input / output line 3 formed on the dielectric substrate 2, a first resonator 4 that has one end connected to the input / output line 3 and the other end grounded, and a second resonator that has one end connected to the input / output line 3 at the point of connection of the one end of the first resonator 4 and the other end grounded via a terminal switch 7. When the terminal switch 7 is turned off, resonance occurs at a frequency at which the sum of the line lengths of the first resonator 4 and the second resonator 6 equals to a quarter of the wavelength. When the terminal switch 7 is turned on, resonance occurs at a frequency at which a half of the sum of the line lengths equals to a quarter of the wavelength.

A method for manufacturing stable lightweight cement slurry in a continuous manner for downhole injection comprising the steps of manufacturing a foamed gas having desired density ranging from about 2.15 to about 2.35 lb / cubic ft. and utilizing foam stabilizing nonionic surfactant. And, an apparatus for carrying out the method.

A mechanism for producing turbulent flow of the air moving over the rear deck of a vehicle is an air flow control apparatus comprising a vehicle spoiler of a typical and well known type having a horizontal portion joined integrally with spaced apart vertical standoffs. Mounted between the standoffs is a rotating spinner held in bearing sets. The spinner provides blades configured for rotating the spinner when the vehicle moves using its slipstream.

An automatic transmission includes a clutch, a clutch drum, a piston, and a brake. The clutch drum, the clutch, and the brake are arranged in sequence in an interior space formed by joining a transmission case to a rear case in an axial direction from the rear case side. A separating / guiding wall that is provided in a circumferential direction so as to define a surplus lubricating oil trapping space for trapping surplus lubricating oil that gathers on an inner peripheral surface of the transmission case and in a second brake, and causes trapped surplus lubricating oil guided thereby into the surplus lubricating oil trapping space to flow downward in the circumferential direction, and a holding mechanism for restricting axial movement of the separating / guiding wall, are provided in relation to spline fitting portions formed on the inner peripheral surface of the transmission case.

An aerodynamic unit is attached onto a roof of a road vehicle so that air passes over the unit during forward movement of the road vehicle. The unit has a first end for positioning distal to a rear end of a vehicle roof and a second end for positioning proximal a rear end of a vehicle roof. The unit includes an inclined guide portion which decreases in height in a direction towards the trailing end of the unit. The unit also includes a flow director, which directs air flow to the guide portion, disposed at or near the leading end of the aerodynamic unit. The flow director has a height increasing in a direction from the leading end towards the trailing end. The unit may include vortex generators protruding from the guide portion. A fin may extend along each side of the unit in a direction between the trailing end and the leading end.

In this high tech computer world the lowly foam rubber mouse pad has a heretofore untapped feature which can be employed to solve a common desktop problem for the personal computer user. By making a simple enhancement of the mouse pad, which takes about 30 seconds to install, the user can take control of mouse cord movement on the desktop. The computer mouse cord, always problematic on the desktop, is collared by a simple binder clip attached to the mouse pad itself wherein the cord is squeezed snuggly against the vertical foam rubber edge of the mouse pad to give frictional control of the mouse cord length for the user at the mouse pad thereby eliminating the cord drag problem and optimizing user control of the mouse apparatus on the mouse pad with all this being accomplished in a very unobtrusive manner on the user's desktop.

The invention discloses an air conditioner. A heat exchanger arranged in the air conditioner comprises a distributor, and the distributor is used for evenly distributing gas-liquid two-phase refrigerating fluid into multiple flat pipes. A mixing cavity, a backflow cavity and multiple flow dividing sections are formed in the distributor, and the gas-liquid two-phase refrigerating fluid input from arefrigerating pipeline flows in the mixing cavity. The backflow cavity communicates with the mixing cavity, and part of the refrigerating fluid in the mixing cavity can flow back into the mixing cavity through the backflow cavity. The multiple flow dividing sections communicate with the multiple flat pipes in a one-to-one correspondence manner, and inlets of the multiple flow dividing sections communicating with the multiple flat pipes arranged below communicate with the mixing cavity, and inlets of the multiple flow dividing sections communicating with the multiple flat pipes arranged abovecommunicate with the backflow cavity. According to the distributor, even mixing of the gas-liquid two-phase refrigerating fluid can be achieved, the uniformity of the refrigerating fluid in differentflat pipes is improved, and the heat exchange effect of the heat exchanger and the air conditioner is improved.