{"id":1959,"date":"2019-02-12T01:48:23","date_gmt":"2019-02-12T01:48:23","guid":{"rendered":"https:\/\/cyflexdoc.wpengine.com\/usage-help-manual\/12-fluid-flow-computations\/"},"modified":"2026-02-23T12:16:03","modified_gmt":"2026-02-23T17:16:03","slug":"19-fluid-flow-computations","status":"publish","type":"page","link":"https:\/\/cyflex.com\/index.php\/usage-help-manual\/19-fluid-flow-computations\/","title":{"rendered":"19: Fluid Flow Computations"},"content":{"rendered":"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Command<\/th>\nPurpose<\/th>\n<\/tr>\n
avl_link<\/a><\/td>\nLink to the AVL Indicom combustion analysis system.<\/td>\n<\/tr>\n
blend_scales<\/a><\/td>\nManage fuel weighing operations using load cells, including controlling fill valve operations and computing fuel rates based on sampling processes.<\/td>\n<\/tr>\n
change_res<\/a><\/td>\nChange the formatted resolution of a variable or a list of variables.<\/td>\n<\/tr>\n
cf_scales<\/a><\/td>\nPerform control functions for a load cell fuel system integrated with a continuous flow meter and flow control valve. The program manages fill valve operations, calculates flow rates, and processes fuel readings, outputting consumption rates and error statistics.<\/td>\n<\/tr>\n
cfv_1065<\/a><\/td>\nCompute air mass flow on a continuous basis per the 1065 standard using inputs from a specification file.<\/td>\n<\/tr>\n
critical_flow<\/a><\/td>\nCompute air mass flow on a continuous basis.<\/td>\n<\/tr>\n
dummy_fr<\/a><\/td>\n\n

Simulate fuel reading events by processing an event name to mimic the behavior of a fuel reading device task for testing purposes.<\/p>\n<\/td>\n<\/tr>\n

emcon_comm<\/a><\/td>\n\n

Communicate with an AVL EMCON6 system to manage dyno control, handling data exchange via sockets, parsing configuration files, and processing input and output variables.<\/p>\n<\/td>\n<\/tr>\n

fa_total<\/a><\/td>\n\n

Perform continuous fuel and air flow totalizing computations for engine performance, including summing rates and calculating metrics like air-fuel ratio.<\/p>\n<\/td>\n<\/tr>\n

fr_log<\/a><\/td>\nSet a fuel reading log file name.<\/td>\n<\/tr>\n
gas_blend<\/a><\/td>\nCompute the ratios of three input gas streams to achieve a specified heating value and methane number for the resulting mixture.<\/td>\n<\/tr>\n
gas_distribution<\/a><\/td>\nSet the values of CyFlex array variables that contain information about emission gases and perform actions based on cylinder states.<\/td>\n<\/tr>\n
gas_mix<\/a><\/td>\nCompute the gas composition of a stream produced by mixing two or more gas streams, using the composition and mass flow of input streams to determine the mixed stream’s composition and mass flow.<\/td>\n<\/tr>\n
gasfl<\/a><\/td>\nCompute gaseous mass flow rates for up to 8 meters based on input specifications.<\/td>\n<\/tr>\n
generic_scales<\/a><\/td>\nPerform control functions for a directly controlled load cell fuel system, including fill valve operation, timing of fuel readings, and computation of consumption rates with error statistics from linear regression.<\/td>\n<\/tr>\n
get_comp<\/a><\/td>\nDisplay or return the value of a computed expression in the specified units.<\/td>\n<\/tr>\n
lc_scales<\/a><\/td>\nControl a load cell fuel system, managing fill valve operations and computing fuel rates based on measurements.<\/td>\n<\/tr>\n
lfe<\/a><\/td>\nCompute gas mass flow rates continuously for a Laminar Flow Element based on specified inputs and configuration.<\/td>\n<\/tr>\n
net_fr<\/a><\/td>\nRequest a single fuel reading and set the fuel weight.<\/td>\n<\/tr>\n
oil_scales<\/a><\/td>\nMeasure the oil consumption rate using a load cell-based system by managing filling operations and computing rates based on measurements.<\/td>\n<\/tr>\n
scales<\/a><\/td>\nControl the fuel scale system by managing fill valve operations, weight selections, and timing for fuel readings based on transition events.<\/td>\n<\/tr>\n
subsonic<\/a><\/td>\nCompute continuous gas flow rates for subsonic venturi meters based on inputs from a specification file, performing real-time calculations and handling events for updates.<\/td>\n<\/tr>\n
take_auto<\/a><\/td>\nRequest a single fuel reading with automatic weight selection.<\/td>\n<\/tr>\n
take_autos<\/a><\/td>\nRequest continuous fuel readings and set the fuel weight selection to automatic.<\/td>\n<\/tr>\n
take_dum_fr<\/a><\/td>\nTake a dummy fuel reading.<\/td>\n<\/tr>\n
take_fr<\/a><\/td>\nRequest a single fuel reading and optionally specify a fuel weight.<\/td>\n<\/tr>\n
take_frs<\/a><\/td>\nRequest continuous fuel readings and optionally specify a fuel weight.<\/td>\n<\/tr>\n
urea_flow<\/a><\/td>\nCollect and process urea flow data, including monitoring total flow and handling fault events in a continuous background service.<\/td>\n<\/tr>\n
Vcone_flow<\/a><\/td>\nCompute the air mass flow on from a V-cone meter.<\/td>\n<\/tr>\n
venture<\/a><\/td>\nCompute Air Mass Flow for a nozzle.<\/td>\n<\/tr>\n
volef<\/a><\/td>\nCompute volumetric efficiency for a single engine manifold on a continuous basis.<\/td>\n<\/tr>\n
volef2<\/a><\/td>\n\n

Compute volumetric efficiency for an engine manifold on a continuous basis using variables specified in a configuration file, focusing on engine displacement as a variable.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Command Purpose avl_link Link to the AVL Indicom combustion analysis system. blend_scales Manage fuel weighing operations using load cells, including controlling fill valve operations and computing fuel rates based on sampling processes. change_res Change the formatted resolution of a variable or a list of variables. cf_scales Perform control functions for a load cell fuel system […]<\/p>\n","protected":false},"author":47,"featured_media":0,"parent":557,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1959","page","type-page","status-publish","hentry"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/cyflex.com\/index.php\/wp-json\/wp\/v2\/pages\/1959","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cyflex.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cyflex.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cyflex.com\/index.php\/wp-json\/wp\/v2\/users\/47"}],"replies":[{"embeddable":true,"href":"https:\/\/cyflex.com\/index.php\/wp-json\/wp\/v2\/comments?post=1959"}],"version-history":[{"count":0,"href":"https:\/\/cyflex.com\/index.php\/wp-json\/wp\/v2\/pages\/1959\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/cyflex.com\/index.php\/wp-json\/wp\/v2\/pages\/557"}],"wp:attachment":[{"href":"https:\/\/cyflex.com\/index.php\/wp-json\/wp\/v2\/media?parent=1959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}